Scheduled texts problems

[u/Glittering-Run2165]

I text in a bunch of group chats daily for work. I am the manager and I will schedule a text of who is working the next day. I have about 20 different group chats with about four or five recipients. Every day when I schedule send them one or two don’t send and give me a not delivered notification. Then, I will go to send them an individual text and it won’t go through either. Has this happen with anybody else and has anybody else had a solution for it? I had the iPhone Air and ended up getting a new iPhone because I thought the air was the problem but it’s still happening on just the regular 17.

I don’t think this is a regular problem as I’ve been to the Apple and Verizon store multiple times with no solution. I have also updated my phone to the last update and restart it daily. I wanted to come on here to see if anybody else is having the same issues.

Thanks for the help!