How to finalize a wordpress plugin in such a way that its update does not overwrite existing improvements?

Question

Web development

There was a need to finalize the plugin, and everything would be fine if it were not for the update problem, in which all or part of the improvements are overwritten.
To improve themes, you can use child themes, but what about the improvement of plugins if they need to be updated?

Answer 1

If possible, send a pull request to the author. If this is not possible, take it out of the vendors and do not update this plugin. Or when some critical things appear, update them manually.

Answer 2

Send a patch to the developer, but there is no other way

Answer 3

There are two options: either send a patch to the plugin author (but he may not accept it for some reason), or fork the plugin and make all updates manually.