Microsoft 365 allows admins to set the maximum to 150mb, but it’s rare that anyone would

There are other mail providers as well. Not sure about the limits though

For schools, self hosted Ms office is the norm, so idk if Gmail limit is in effect.

They’re technically half right though. Gmail does have a native send limit of 25mb, and anything above that will be a drive link. They can just receive larger ones and other services like 365 have higher limits available.

Gmail can receive 50mb files even though it can only send 25mb files

365 supports up to 150mb files

A lot of organizations (such as colleges like this one) set their limits to 50mb

On an anecdotal note, I always set at least 50mb limit for the organizations I manage in 365.