It is legally binding. By accepting ToS, or using service with ToS, you are entering a legal contract. And as long as ToS isn't breaking laws (like Digital Services Act in EU, or Online Safety Act in the UK) it can be fully enforced.

Here is an example of ToS being enforced: https://kennedyslaw.com/en/thought-leadership/article/2023/n...

Another example https://www.internetlibrary.com/cases/lib_case392.cfm