This helped me figure out what to do on my phone, Pixel 7a.
In Mobile view, tapping on the > on the right hand side of the email opened it. But when I return to the inbox that method didn't work again. Otherwise I'm hitting reply and reading the emails that way but none of the active links work nor can you press and hold to see what the link is.
I've tried to add iCloud to my Google mail account list, using the app specific password, but no combination of port and protocol works.
It's a shame, they were playing so nicely together until this year.