Hi!
Tons of examples on how to solve similar challenges in this same community.
My suggested approach is:
1.- REad all items whose status is 'In progress' by means of 'Get items' action block in the last 7 days
2.- Build an array variable with all users emails
3.- iterate all through them by means of an 'Apply to Each' whose input is the users emails' array
Now inside the apply to each:
4.- 'Filter array' action block assigning as its input 'Get items output' and setting its condition rule in order to extract items whose user assigned equals the one from current iteration
5.- 'Create HTML table' assigning as its input 'Filter array' output
6.- SEnd an email to current iteration email
Does this approach matches your requirements? If so, please let us know your progress on this flow design, and if you find a blocking issue, share a screenshot with current flow design
Cheers!