I saw in Joomla only a button for converting standard components to utf8mb4, but I did not see such a button to convert all the other components.

I suggest adding this button for converting all fields of the database to utf8mb4.

I do not know when extension developers will make such a button for their extensions. I have a database in three different encodings, a database for the site because of different extensions.

For example, I can use Emoji characters only in standart Joomla components, but I can not use these characters in some other components on the site, for example, in the JComments comment component and others.

This is really a big problem now. Please make a button for converting all the site tables into utf8mb4.