I cannot connect my MacBook Air to the Internet using Personal Hotspot

I am using the same iPhone and network names.

The problem is partially solved. I followed the suggestions in the link that you provided and when I reset the network, two of

my three Mac Book Airs can now access the Internet, one cannot. I tried restarting both phone and computer, resetting the network again, but to no avail. The computer that can access the net is running macOS 10.15.3, as is the

computer that can't!

I have have tried a range of things to get things working. Right now, on two of my computers, I can connect to my iPhone on wifi, but not to the Internet through wifi. My phone connects to the Internet using Safari with no problem. I can also connect to the Internet through Bluetooth from both computers.

I have reset the network several times, restarted the iPhone and computers several times, changed the name of my iPhone, turned wifi on and off on the computer and phone. I am pretty stumped!

Interesting. When I followed the link for Instant Hotspot, I was able to choose the iPHone easily from my Mac, but when I went to the iPhone/Settings/WiFi, there was no iPhone shown:

On your iPad, iPod touch, or another iPhone, go to Settings > Wi-Fi,

then tap the name of the iPhone or iPad providing your Personal Hotspot

I was unsure how to proceed with your second suggestion: "remove the network setting". I do not know how to remove the network setting on my Mac!

The wifi password in Settings, Personal Hotspot, ramains the same. I do not recall being asked for the password when I attempt to connect to Personal Hotspot.