@bertshowell,
I think you're missing some key facts about the way payment requests work. They are merely a note or a message that you can share with someone that owes you money.
For example, I create a payment request, and right-clicked on it to get some information:
If I click on "Copy URI" I get a window to pop up with this text:
bitcoin:1Q3Z9DWwMAKmYyYHW6hUK7YJXUu8Laqeyp?amount=0.01&message=wages%20for%20flipping%20burgers&time=1584298995
I can also save the request as a .bip70 file, which can be opened by various bitcoin clients. Again, it's just a message that includes the payment address, the amount requested, and the description text. The request doesn't interact with the blockchain.
If I were to send you this request, and you use it to populate your "send" transaction, my request will show the same thing as the history tab. Or, you can ignore the request and build a send transaction of your own. For example you can create a transaction that has the same payment address, the same amount, but in the description you type "DireWolfM14's wages for flipping burgers," or decide to leave it blank. In that case you would send me the money you owe me, but my request will continue to show "Pending."