true in France, but in other countries, some AF Lounges accept PP at hours without AFKL flights. The USA for instance, as mentioned by another poster.

To OP :
- CDG : no access to AF lounges with PP. On top of that, as you mentioned, AC is using a different terminal than AF and they are not connected airside.
- YUL : no idea if they accept PP, but if they do, I guess it will be at a time that will not match with your AC flight to Paris. At this time, AF has up to 4 daily flights + 1 KL flight. So the lounge is super busy and it’s very likely you’ll be denied access.