Help with UITableView and cell width

I have a script that pulls my upcoming bills and displays them in a UITableView.

I mucked around with the cell widths to get it working on my XS:

but when the same script is run on an 11 Pro… I get columns that look like this:

I have the widths set as 100,100,30

Can anyone offer some suggestions as to how I might get this to fit more universally on different screens?