Guntenberg & Classic side by side option?

Hello David, I have the Indieweb plugin working for a while now and it’s very nice to receive replies from others indieweb style, but because I use the Gutenberg editor I’m not able to return the favor. I understand it’s quite complicated to make it work so I understand why it’s not.

But I’m still looking for a way to make it work. And non technical as I am, I’m wondering what would happen if I use the classic and new editor side by side? So if I want to use the post kinds of the Indieweb (like reply) I use the classic editor and on the rest I use the new one.

Is this an option or am I talking nonsense and will I break my site in two? Or is it an option to create a reusable block (group) with the right specs / code attached?

Thanks!

Config at the moment: WP 6.03 PHP 8.1 and theme Independent Publisher.