Re: How do I add people to People and Pets ..........
Wondering if you have tried following Apple Support's online artiicles for iOS26:
Eg: Find and name people and pets in Photos on iPhone - Apple Support
says:
" Name a person or pet in a photo or video
When you name a person or pet in a photo or video, they’re automatically added to the People & Pets collection and named in other photos and videos in your library.
- Go to the Photos app
on your iPhone. - Open a photo or video, then swipe up to see the details.
People or pets in the photo or video appear in the bottom-left corner.
A question mark appears next to those you haven’t named.
3.Tap the person or pet with a question mark next to their picture, then tap Edit Name and Photos.
4.Tap Name This Person or Name This Pet, enter their name, then tap 
________
If needed: There's more info, in the above linked article.
________________________
Re: "How do I add ... photos to Shared Albums? : when I try to upload a new photo to a shared album - I can select which photos I want to add, but then I have only the option to click on a blue checkmark or the "X button" - and neither does ANYTHING - the whole interface just freezes until I swipe it away."
See how to: Add and delete photos and videos in a shared album on iPhone – Apple Support (AU)
Eg: says:
":Add photos and videos to a shared album
- Go to the Photos app
on your iPhone. - Tap Collections.
- Tap Shared Albums, then tap an album.
- Tap
, then tap Add Photos. - Select photos and videos, then tap
.
When you add new photos, the people you share the album with are automatically notified."
___
NB: If you have installed iOS 26.2 the latest update,
and
the latest methods from Apple Support (above) are not working for you:
You may want to send feedback to those who work on the software behind-the-scenes at Apple:
Web-form for feedback: Feedback - Photos - Apple
_______________________________________
For more info. / support / contact options etc.: Photos Support Website: Photos - Official Apple Support