iMessage Problems after 18.1 Update

This is beyond an issue. Funny there isnt much online published about it. I have spent at least 6 hours over the past 2 weeks on the phone with Apple support up to the Engineering level only to only be told they are aware of the issue and working on it, and it is affecting many users. I am unable to communicate with my husband who is an android user and missing work texts because of this issue. This is a huge failure on Apple's part and needs to be addressed immediately. I am giving this one more week then I will go to android. I have never used anything but Apple however I feel the response to this issue is unacceptable, or lack of response really...EXTREMELY frustrated.

I am unable to send photo's to non iphone users. It shows - "Text Message . SMS" or "text Message. RCS" in the text box. Are there any fixes other than turn off and on - and unclick SIR and reset network. This is very frustrating

Were you able to resolve this issue? I am experiencing this as well for a few weeks and no luck with a solution!

Since the 18.1 update, problems with group texts, can’t text over wifi, etc. Argghhh. One person in the to line seems to work, 2 turns them both red and can’t send.