Is it possible to create a custom field in WP only for certain templates?

Question

WordPress

I have many separate page templates and would like custom fields to be displayed only on those pages where they are needed, i.e. for one template there are some fields, and for another there are already others. Can this be done at all? I create custom fields without a plugin, manually in functions.php.
PS This is all about the admin panel, I mean, on the site it is clear that you can display only what you need.

Answer 1

https://www.advancedcustomfields.com/ cool plugin, if you don't spare money for the pro version, it will come in handy, you can do a lot of things