I have questions about the brown spots on the leav...

What up B ! yo you got a bunch of stuff happening bro, first off over watering, you can tell from the wrinkles and the puffy space between the veins on the leaf. Second you have (/had?) some sort of PH fluctuation which is causing that burning you're seeing on those leaves. Hard to fix but basically you want to make sure your watering are at around 21°C and 6.0PH . Keep the affected leaves around so you can see if the problem is getting worse or not, i wouldnt remove the leaves until they are like 70% destroyed, what's simple leaf plucking to you is HST to the plant does that make sense ? you dont want to stress her just yet... Thirdly I'm not liking that color on those leaves, why? looks like you're feeding flower nutes and she's lacking Nitrogen , simple as that - try upping it by like 15-20% see if that helps . Finally, i'm not liking how those leaves are curling on the edges, you're tuned in light and temp wise so the only thing i can think of is that the overwatering has led to the start of minor root issues. Not as bad as it sounds but it ill hurt the growth... so try adding enzymes or humic and fluvik acids the next few watering to break down the problem roots and see if she recovers. Hope this helps ! 🚀