Group for custom fields

Because of the number of custom fields used, it could be interesting to have the possibility to group them in different categories, as all are actually presented in a unique “Custom fields” group
Could this be an idea for the future?

What is the use case? It’s very hard to imagine an accounting justification for grouping custom fields. If they are important enough to justify their existence, you certainly would not want to hide them. You can already control their order of presentation. So why would you want the extra work of revealing them so you can fill them in?

Reasonable idea.
Which YOU can easily implement by choosing structured names.

Currently all the custom fields appear one after the other (only one per line) and it is sometimes possible to forget to fill one out.
Of course it is possible to order them but physically grouping them according to the same theme could facilitate entry (and finally perhaps also the possibility of positioning, for example, several fields of the same group on the same line for entry and printing and thus limit the size of the final document)

Well that would make edit forms easy to fillout like grouping address, contact and Tax no fields seperately and also sorting their position would be easy that way.

You cannot control the layout of the entry screens in any way.