Problem with hotspot

My Surface cannot to connect with the net from hotspot in ilPhone 8. See him, but he’s on this- „cannot to connect with this network”. It wasn’t like this from always, since half year. Reading about this on even deep sites of forums, trying simplest method like forgotten network, actualozation of network cards, again reseting back to fabrication settings, even cleaning Lines i regist - using regedit. Finally ask about help some guy - sister’s Man, who is programmer. Nothing. Aa on my second phone IP 12 surface even can’t see him - invisible. You are specjalist. Tell me what am i doing wrong