I have an SPO List (This site was not created by me, but by our SPO team, I can't change these columns).
I have a column called AssignmentDays.
The choices in this this column are 0,1,2,3,4,5,6
The numbers represent the day of the week, starting with Sunday.
If I present this form to the end user in the App, they see the numbers:

If this is insanely complicated, then I will just not add this feature.
Here is what I am hoping the end result will be.
Instead of presenting the user with the numbers, the choices will actually be the days
Sunday, Monday, Tuesday.....etc.
The user can select multiple choices.
When they submit the form, the NUMBERS are actually submitted to the SPO Column as that is what is required there.
So for example,
instead of being presented with 0,1,2,3,4,5,6
The user is presented with Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
If the user selects Sunday, Monday, Tuesday, Wednesday, then what actually gets submitted back to the SPO List will be 0,1,2,3
is this possible?
EDIT: One thing I forgot to add, is this column is already prepopulated with these days.
So if a user currently has 4,5,6 in that column, and they submit 0,1,2,3, then that 4,5,6 is overwritten, and only 0,1,2,3 will be there.
So would we need to clear that column first, or will the form just atuomatically do that?