Hi. The only plus of SP Table Addon is that it has filtration and pagination. In all the rest, this is a very uncomfortable addon, requiring a huge amount of time to set up. And that is why it cannot be added inside the accordion, like other addons using javascript. This is not a restriction of SP PB and the total expected behavior for the accordions, tabs and ect. It is meant for static content without JS on board.
If you need to quickly build beautiful and responsive tables, just take the rady made code from the bootstrap documentation https://getbootstrap.com/docs/5.0/content/tables/
You will be able to quickly edit content in this tables right via WYSIWYG editor. That is not possible in SP Table Addon