Looks like today they brought the hotspot speed limit back. Iphones seem to be immune. Apple's walled garden working for the consumer for once.
I guess you have been some of those that has been lucky. Mine has always capped at 5mbps or close enough. Every once in a while, if within a large city where id get 80mbps or 100mbps, will the hotspot work a a higher speed (normally not more than an extra 5 mbps).
I believe they said the hotspot restriction was lifted a while back so you should have been unrestricted as well. Sometimes it needs a reprovision I guess. But seems like everyone is limited now. 5Mbps isn't too bad. You can get things done.
Maybe they did it for Covid-19.
So, I did some quick testing now that I am out of the house and got strong results from the device and 5.48 down with 5.20 up from the hotspot device.
Edit:
Added an AT&T test at the same exact location $85 plan(the max plan with 100 GB of priority data - yep did the AT&T gift card thing and already got it a few days ago).
Link to info. re the "gift card thing"?