save() with multiple tables

Hi! I'm new with CodeIgniter 4 (and with web frameworks in general), and while I was doing a project I've encountered a problem. I want to add an element to a DB, but I'll need to write into two different tables (one of them with a foreign key to another). Can I achieve it with $model->save() or do I have to use another method to achieve this (like a DB query with JOIN or something like that)?

Thanks in advance 

@yucar,

The approach that I've always have taken is update the base part of the record first then update the related table second but within the same model. Specific criteria are meet which allowed the secondary table to be updated.