Acoustic treatment ideas

Hoping someone out there has a similar situation they have solved or mitigated.

I have an open floor plan with acoustic panels on several walls, nothing on the 8ft ceiling, and several reflective surfaces.

TV between speakers on the wall

large picture window, and French doors on back wall (not directly behind speakers), glass door china cabinet on right wall, no window treatments.

rear wall which is entrance to the house has 2 large picture windows with blinds.

If I hang blankets over the cabinet, tv and rear wall windows I definitely hear an improvement- much better sound stage, but it’s a pain and looks awful.

There is a pic in my v system that shows some of the room

ideally it would be something that could be remove like acoustic fabric if such a thing exists rather than curtains etc.

Any ideas?

thanks in advance!