Only one track sub-grouping header is not enough for me.

[I have a plan]

I usually use <Set Subtitle> and <Grouping> respectively to store discsubtitle and other group info in Booklet.
So I need 2 levels of sub-group in Albums and Tracks Layout to display discsubtitle and other group info at the same time.
Like this: https://www.dropbox.com/s/bzdxvyj4gdr254a/%E6%89%B9%E6%B3%A8%202019-01-03%20002013.jpg?dl=0

English is not my mother tongue, and can you understand my description?