Format Painter to quickly edit multiple tiles

Are you using a Theme? If you add a named style to the theme, then you can customize that one style however you see fit and reuse it. You still have to select that named style for each tile, but if you want to make changes to the named style (in the Theme), it will automatically apply to all of the tiles that are using that style.

There’s a feature request open for bulk editing of tiles here that you may want to vote on: