Hi @TrevorG ,
For the first question, you could create two variables 1 stands for today, the other use variable1 to get the date a week after. Both variables are Text format. Then you could use
FormatDateTime(variables('utcNow+7'))
in Expression to get the date value:

For the second question, you could add a label to count the week number and use the result in the Flow:

The formula of counting week numbers is from:
https://powerusers.microsoft.com/t5/Building-Power-Apps/How-to-calculate-week-number/td-p/20161/page/3
"Weekly Task (week & "
If(
Or(
And(
Year(DatePicker_tr.SelectedDate) / 4 - Round(Year(DatePicker_tr.SelectedDate) / 4,0) = 0,
Weekday(Date(Year(DatePicker_tr.SelectedDate),Month(1),Day(1))) = 4
),
Weekday(Date(Year(DatePicker_tr.SelectedDate),Month(1),Day(1))) = 5
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)+1, // Makes 53 weeks in a year
If(
And(
Or(
Weekday(Date(Year(DatePicker_tr.SelectedDate),12,31)) = 2,
Weekday(Date(Year(DatePicker_tr.SelectedDate),12,31)) = 3,
Weekday(Date(Year(DatePicker_tr.SelectedDate),12,31)) = 4
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)=53
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)-52,
If (
And(
Or(
Weekday(Date(Year(DatePicker_tr.SelectedDate),12,31)) = 2,
Weekday(Date(Year(DatePicker_tr.SelectedDate),12,31)) = 3,
Weekday(Date(Year(DatePicker_tr.SelectedDate),12,31)) = 4
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)=52
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)-51,
If(
And(
Or(
Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1)) = 6,
Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1)) = 7,
Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1)) = 1
),
Or(
And(
Year(DatePicker_tr.SelectedDate-1) / 4 - Round(Year(DatePicker_tr.SelectedDate-1) / 4,0) = 0,
Weekday(Date(Year(DatePicker_tr.SelectedDate-1),Month(1),Day(1))) = 4
),
Weekday(Date(Year(DatePicker_tr.SelectedDate-1),Month(1),Day(1))) = 5
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)=0
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)+53,
If(
And(
Or(
Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1)) = 6,
Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1)) = 7,
Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1)) = 1
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)=0),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)+52,
If (
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)=0,
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)+1,
If (
And(
Or(
Weekday(Date(Year(DatePicker_tr.SelectedDate-1),12,31)) = 2,
Weekday(Date(Year(DatePicker_tr.SelectedDate-1),12,31)) = 3,
Weekday(Date(Year(DatePicker_tr.SelectedDate-1),12,31)) = 4
),
RoundDown((Date(Year(DatePicker_tr.SelectedDate-1),12,31) - Date(Year(DatePicker_tr.SelectedDate-1),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate-1),1,1) - 1,Monday))) / 7,0)=52
),
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)+1,
RoundDown((DatePicker_tr.SelectedDate - Date(Year(DatePicker_tr.SelectedDate),1,1) + (Weekday(Date(Year(DatePicker_tr.SelectedDate),1,1) - 1,Monday))) / 7,0)
)
)
)
)
)
)
)
& ")"
Hope this helps.
Best regards,
Community Support Team _ Jeffer Ni
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