dont worry about the look of the plants, you are close to finish them.
for the next grow you can change some specifications like less light and nutrients, more water and a good VPD
Hey did you measure PPFD? How is your light distance? Looks like light burn to me tbh. That light green color on those Frosted Guavas could indeed be root issues. Are their leaves drooping regularly? Some things you could check up✌️ keep it up!