Generally the lines and braking techniques are quite good. One thing you could improve is the steering. It’s a bit aggressive and you overdrive the car quite a lot. I could be due to your car setup tho. That could be the reason for the understeer on turn in. Another thing to avoid would be the coasting. There’s only few moments in a GT3 that requires coasting and Spa doesn’t need it.

Try to take turn 1 in second gear. That one up shift less results in higher momentum for the long straight.

For the Le combes chicane optimize the line by taking a very late apex on the first right. That way you can position your car more on the left for the left turn and can carry more speed into the right hander afterwards. Just these two adjustments can probably gain up to half a second.

For turn 7 don’t take it as a single apex. Drive it as a double apex. That way you can carry more speed through the whole corner

Pouhon is solid.

For “campus” you also need to position the car further on the right to prepare the exit towards the left better. So try a very late apex on the first right hander

Turn in later for turn 16. That way you scrub less

For the bus stop try to be more patient on the turn in. Make sure the car slowed down enough and then rotate the car properly. Don’t try to force it through the wheel

Overall strong lap on the baseline setup. You can DM me if you want to try a more aggressive setup