I've released Formatting Extender 3.0.1 with more control over inline formatting in the Block Editor. You can inspect, edit or remove CSS classes on selected text and whole blocks. Class suggestions are easier to navigate with a keyboard.

Badges and highlights can now use theme palette colors or custom colors, with contrast feedback and a reset control. Existing saved formatting needs no migration.

Update from Plugins, then select text in the editor to try the controls. The Formatting Extender page on WordPress.org has the download and details. If an existing badge or highlight changes appearance on your site, share the theme and an example.