Hello there RemoteFix,
It sounds like you are able to turn on Personal Hotspot but other devices cannot connect to it. I would use these troubleshooting steps in the following article:
iOS: Troubleshooting Personal Hotspot
If you encounter an issue using Personal Hotspot with other Wi-Fi devices, try these steps:
- Turn Personal Hotspot off.
- Turn on Wi-Fi: Tap Settings > Wi-Fi.
- Turn on Personal Hotspot.
- If another device can't join your Wi-Fi network, make sure the Wi-Fi password is correct.
- If the device can't see your Wi-Fi network, check your device name. Windows may not correctly show a device name that uses non-ASCII characters.
- See how many devices are using your Personal Hotspot. Depending on your wireless carrier, the number of Wi-Fi connections may be limited to three devices at once.
- If the other device still can't connect, turn Wi-Fi off and on for the device.
- Make sure that your device can see other Wi-Fi networks.
Note: If you see "Unable to Join" or a timeout error when you try to connect a device using Wi-Fi, remain on the Personal Hotspot screen until the first device connects. After the device connects, you can leave the Personal Hotspot screen and use your iPhone normally. Your device will stop broadcasting Wi-Fi if you put it to sleep or if 90 seconds elapse and no connected devices use Wi-Fi. To share your Wi-Fi network again, tap Settings > Personal Hotspot.
Thank you for using Apple Support Communities.
All the best,
Sterling