this needs to be addressed T-Mobile.

There is actually no other carrier outside of T-Mobile that has a specific rate plan that does not throttle. Every company has unlimited data but every single company also throttles you. When T-Mobile came out with Magenta Max (starts at $85 for 1 line and autopay) they became the first company that offered a truly unlimited data plan with no throttling. That plan actually became grandfathered today along with Magenta but will still be available solo por Internet for new customers who do their activation themselves. The new plan that will replace Magenta Max starting today 04/23/23 is called Go5g Plus which is $90 for 1 line with autopay. 
The fact is you pay for what you get. 
If you’re concerned about slower speed then you need to be willing to pay for premium service features or connect to Wi-Fi more often.