No Internet on MacBook Pro, WiFi ok on other devices.

There are two paths to proceed along:

One is to set up your Wi-Fi connection from scratch. This article tells how to set it up using the concept of network location Files. be sure to NOT use the default name, but create a unique name:

How to use network locations on your Mac - Apple Support

Another way is to assume you have software that is interfering, and use this little "discovery" Utility, Etrecheck, to reveal what might be causing the problems. Launch the application, then change it settings to "allow full disk access", then say GO.

It generates a report that can be posted back here for readers to analyze.

Using EtreCheck to Troubleshoot Potential… - Apple Community.

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Hold down the Option key while you click on the Wi-Fi icon on the menubar. you get a snapshot similar to this older one:

post the values for the stuff displayed, or a screenshot.

ALSO, How many Networks can you see from there?

Your hardware appears to be working fine.

Try This:

enter 1.1.1.1 in the search/address bar in a Browser.

¿Do you get the CloudFlare splash page?

-- Yes, you likely have a Domain Name Server issue, such as set to 0.0.0.0, completely missing, or set to an address that is no longer working

--No, more digging will be needed.

Sure but DO NOT collect a "diagnostics report". It is not a human readable report, it is a DUMP of every setting that could possibly impact Wifi performance, and completely unfiltered with NO Conclusions. It is intended to be sent to an Apple Network Engineer for analysis.

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See if a proxy is being invoked:

System preferences > Network > WiFi > (advanced) | proxies ...

should show Nothing checked and ONLY this in the Bypass Proxy settings box:

*.local, 169.254/16

Restart in Safe Mode and attempt to connect.

"Works in Safe Mode, but NOT in Regular mode" means, "It's something you added".

This is because safe mode loads only a minimal set of Apple-only extensions, and takes defaults for whatever it can. Safe mode does not load graphics acceleration extensions, so screen redraw will be wonky and slow, but ultimately correct.

The first one is easy, and if it works, you can skip the second.