How to classify this scheme and what analogues are there?

Question

Database design

Good afternoon!
There is such a database design scheme:

The meaning of this scheme is to organize an entry point for all products of a company, this gives some flexibility.
That is, the following is done:
1) A list of tables is created in "tables" (where name is the name of the table in the database, pk_name is the name of the primary key of this table)
2) A list of products is created in "products" (where table_id is the table identifier from tables, pk_value - the value of the primary key of the table)
3) The tables some_product, another_product, etc. are created. which contain different fields for a specific product The
question is:
1. What are such schemes called?
For example, EAV is also designed for database flexibility, but in EAV, columns are stored as records in the database.
2. Therefore, I cannot understand whether it is advisable to compare this scheme with EAV?
3. What analogues are there to understand what is better to use?
Thank you very much in advance!