Since you are the player, not the DM, pass these two suggestions from DM's Guild to them:
Abyssal Incursion - Note: Light spoilers for Baldur's Gate: Descent into Avernus in this description! Expand your Baldur's Gate: Descent in
www.dmsguild.com
Encounters in Avernus - This product is now Adventurers League legal!Bring your Hell to life with this companion supplement for Baldur's Gate:
www.dmsguild.com
They both add on to Descent into Avernus and the first one includes material to get characters up to level 20. And they are from the Guild Adepts program, so they are as close to official as possible without being a hardcover published by WotC directly.