Save Tab Groups

My list of saved Tab Groups is getting pretty big, as I have a group of saved tabs for each project.
Is there a way to create a menu group within the save tab groups to group all my tab groups by subject.
OK... I know that is confusing.
I have groups 1001, 1002, 1003, 2001, 2002, 2003, 3001, 3002, 3003.
Can I make Tab Group menu headers called
1000 to contain, 1001, 1002 & 1003
2000 to contain, 2001, 2002 & 2003
3000 to contain, 3001, 3002 & 3003

I hope this makes sense.
For example, some apps (e.g. MP3-Tag) when a group name is followed by a hash sign # it starts a sub group.

Thanks all

There isn't currently any automated way to do that. You'd have to make the whole menu manually, with a button for each group rather than just one button which Opus turns into the list for you.

So you can do it but it'd probably be a pain if there are that many groups.

Just installed 10.5
And the Tab Groups ARE GREAT !!!
Thank You !!!

I put the folders at the top of the list, with an empty group represented by a hyphen separating the misc & various groups underneath.

Opus Rules !