lil tip burn is no big deal. generally healthy plants in the pictures. I'm guessing they are more lush in RL as opposed to the lighter green we see under grow lights (safe assumption).
i'd wager you recently switched to a "bloom" formula. So, it's most likely p or k is a bit too high. if it doesn't progress no big deal. if it does, consider dialing down any changes to the formula that were recently made anytime in the last 3-4 weeks. slow rolling tox/def is much preferred problem. it often takes a long time for an imbalance to play out and be visible. when it happens quickyl it's an absolute catastrophe in regard to formula lol.