bias regulators with variable gain

Hello,

A short question for those who know more about recently released components on the audio chip market...

Having had some interest in MOSFET amplifiers, I noticed that Linear Technology already for some years has marketed the LT1166 unity gain MOSFET bias regulator. There are some posts on the forum from 2017 about this. To make things easier (and more compact with building, and possibly retaining the low THD-N) a low THD voltage amp needs to be added.

Are there any similar chips as the LT1166 with variable gain on the market?

Martin