iphone no longer able to be read by my macbook after iOS upgrade

I've solved this issue. The consensus was that my update of 15.3 was corrupt on my phone so I did a final backup of my iphone to icloud and forced it into recovery mode (my computer wouldn't even read it to be able to factory reset).

How to force your iphone into recovery mode when it won't respond to screen prompts:

https://support.apple.com/kb/index?page=search&type=organic&src=support_searchbox_psp&locale=en_US&q=force+iphone+into+restore+mode

I was then able to restore my iphone from my icloud backup just like if it were a new phone. I was nervous that a backup made from when my phone had a corrupt iOS would render it unreadable but this was not the case. I got everything. Note: I reinstalled the iOS 15.3 and all software from my computer not from my phone.

thank you to everyone that chimed in with suggestions...

thank you for the advice. I tried this and it did not work, which doesn't surprise me since I have tried to connect my phone to multiple mac computers now, all give the same error 'can not read your phone, you have to factory reset your phone'. And my primary macbook has no problem recognizing and reading other iphones with older iOS's. So I really think this is a problem with the new iOS (15.3). I no longer have any way to back up my iphone. I suppose it's time to go in to the genius bar. thanks again for trying to help

That is not the error I am getting. I will include a screen shot of the error I am getting. It is saying my phone needs a factory reset, not that I need a software update. Plus, I am running Monterey 12.1 OS so there is no software update needed for my mac.

I know about the "trust this device" part and made sure I went through that before I originally posted (but forgot to include that detail in my post). thanks for the tip!