mid-flower yellow leaves

The way the serrated edges are raised and the yellowing is mostly on the top or where the light hits. i have to say that this is a case of light burn. its very minimal but i would raise or turn down your light a

The most important info you could give is the medium type.... I doubt this is soil so I'm going off coco probably and if so your not getting run off so salts have built up.. fire some water threw her and then on the next water add a little bit of everything you have that go together and I mean a little bit, just so it's there for her to pick and choose between. Make sure ph is correct.. 5.8-6 for coco 6.2- 6.4 soil.... She looks sad is that humidity, temp or to much or not enough light. I'd go to much light and humidity, do you have a fan breezing over her???. There a lot to keep in check..

If it was nitrogen it would cannibalize old growth so that new growth would look pristine. Nitrogen is mobile. Greening all over with no obvious starting point hints toward micronutrients. Temps are in line, rh in line, ... Slight burning of tips indicating possible high salinity in soil. In general, all micronutrients decrease in availability as pH increases, if I had to guess I'd say high pH is causing uptake problems, check ph, might also need to flush a little salt out of that medium. Feeding fert a little too fast for the plant over time possibly. Track EC to prevent.

Might want more of something or may need a bit more runoff in the feeds. Temps and RH seem on point. Start a dairy for next time. https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg a leaf chart for refrence points.

HI bud. Without a diary it's hard to tell for 100% certainty. It looks as though she wants a little more Nitrogen (BioGrow) and perhaps a little more CalMag. These are nutrients she will need throughout the bloom period too. If those are already at decent levels, then it may be a ph problem. Do you measure regularly?