etresoft knows exactly what he's saying. And he's correct.
Before Ventura, you could use most better third party font managers to disable any number of, or all of the fonts in the /System/Library/Fonts/Supplemental folder. As of Ventura, you can no longer do that. The system installed fonts are completely off limits.
You'll notice Font Book doesn't show all of the system installed fonts. Neither does Pages, Numbers, or any other Apple created app. Since at least Catalina (and if I remember correctly, it actually goes all the way back to El Capitan), Apple has had an API available to all developers to hide the same foreign language fonts.
The latest Microsoft Office suite does this. So does the entire Affinity suite. For unknown reasons, Adobe is a holdout.
But to focus on your issue of Helvetica. Forget Type 1 PostScript, or old legacy OS 9 suitcase style TrueType fonts. They conflict with the OS installed version of Helvetica. You will never be able to use these again. And it doesn't matter since both of these font types are destined to be completely obsolete very, very soon.
Going forward, you have two choices. You can use the Helvetica fonts installed with the OS. Or, if you need a more complete set, you can purchase the Monotype Helvetica OpenType fonts. These are only available with a subscription. Adobe removed all of their OpenType Helvetica fonts back on June 1, 2022. If you still want to purchase Adobe’s Helvetica fonts, the only way to get them now is to either find a seller online who still has new copies of Font Folio 11, or look for used copies on eBay or the like. Either of these do not conflict with the system installed Helvetica fonts and can be active at the same time.
If you have a requirement to use older versions of Helvetica, then you must be running a version of macOS prior to Ventura.