What's this mint mark

This is a 12 denier from France 1792

Around 11 grams, and 29mm

What's the mint mark here beside A? (It's circled in red)

Always provide a link to the things you are talking about!

N#4007 

That's not a mint mark, probably a privy of the mint master or die cutter … maybe something similar to this
https://en.numista.com/sales_archive/pictures/62a83e0700bbb.jpg

In 1792 there should be a lyre after the A. It doesn't look like a lyre to me. Is it because of the wear or is there a second A (under the green arrow between the green lines)?

Because then it's not Paris mint but Metz mint and then the privy mark for 1792 is a hermine, and on your coin it looks more like that than a lyre.

No it's like the Paris coin I linked.
Here are a few more examples in worse condition more similar to OPs

https://www.cgbfr.de/louis-xvi-monarque-constitutionnel-12-deniers-dit-au-faisceau-type-francois-1792-paris-tb-b,bry_757467,a.html

https://www.cgbfr.de/louis-xvi-monarque-constitutionnel-12-deniers-dit-au-faisceau-type-francois-1792-paris-ttb-,bry_902139,a.html

https://www.ma-shops.de/cdma/item.php?id=1066227