Unable to connect Chamberlain garage door opener via 5g internet

I am having the same issue with my smart garage. I don't have the Chamberlain, but the Genie Aladdin. No issues connecting any of my other devices to T-mobile. My garage had no problem functioning off of the cable internet. Spent a great deal of time on the phone with both T-Mobile and Genie. Neither could figure it out. It says there is wifi available but it will not connect the device. The service is strong in the garage bc I did internet speed tests on my phone. The most frustrating thing about it was the gentleman I talked to from T Mobile had me reset my T- mobile box disconnecting EVERYTHING in my house from wifi to resolve the issue. It did nothing but cause a ton more work reconnecting everything that works. Waiting on calls back from both companies but after reading this I am starting to feel like this is an issue all around for those of us with smart garages. It needs to be resolved. I rely way to much on the functionality of the smart garage door with my kids. I tried to tell them what I was reading in the comments here but it was crickets on their end. They acted surprised. If anyone has any recommendations on how to resolve this I am all ears!! Already tried separating the combined networks. It did nothing but cause a hassle. Restarted devices/reset devices. I am at a loss.