Not sure if I understand it right, are you talking about nested tabbers?
If yes, see Help: Tabber § Complex Tabbers
You have to create sub tabbers using the #tag: parser function.
Seeing that all your tabs contain tables, be aware that also the wikitext table syntax does not work within nested tabbers. You will have to escape every pipe with the magic word {{!}}, e.g.
| --> {{!}}
|- --> {{!}}-
or use designated escape templates.
Alternatively, you can use html syntax instead of wikitext.
Generally however, I would avoid mixing wikitext and html table syntax within the same table (like you're already doing now, for no apparent reason).
Also, it's not really a very good idea to have tabbers inside a table, I think. This wil not work well for mobile users.
Then:
"width=", "height=", and "align=" are all deprecated html that should not be used anymore. Use CSS instead: width: / height: / text-align:
I'm also kinda confused about your use of position: relative and absolute within table cells. I'm not sure this is even a valid way to use this.
Finally, the whole template does not work in dark mode: