I understand your issue and I face it on daily basis. Whenever a device is connected to an iPhone’s hotspot and then locks, the hotspot automatically disconnects. Idk if other people here didn’t really understand that, in which for example hotspot with laptops won’t disconnect cuz the laptop won’t be locked. They might really have not faced it yet.
However, as this issue is common per my experience and people I know, a quick solution is to pair the hotspot iPhone via Bluetooth with the receiver device, and it won’t disconnect even when locked.
I understand your issue and I face it on daily basis. Whenever a device is connected to an iPhone’s hotspot and then locks, the hotspot automatically disconnects. Idk if other people here didn’t really understand that, in which for example hotspot with laptops won’t disconnect cuz the laptop won’t be locked. They might really have not faced it yet.
However, as this issue is common per my experience and people I know, a quick solution is to pair the hotspot iPhone via Bluetooth with the receiver device, and it won’t disconnect even when locked.