Based on the heavy clustering of small pests and nymphs along the leaf veins and lower surfaces, these appear to be aphids (or potentially a heavy infestation of whitefly nymphs, though the oval shape and clustering pattern strongly point toward aphids).
Treating with neem oil and insecticidal soap is a solid approach, but alternating them too closely or applying them while leaves are already stressed can cause additional leaf burn. When dealing with an infestation this dense, checking nearby fan leaves and inspecting buds closely for hitchhikers or pest residue is essential.
Next Steps & Recommendations
1. Rinse and Physically Remove
Immediate
Use a gentle stream of pH-adjusted water or a weak insecticidal soap solution in a spray bottle to physically dislodge and wash away the clusters from the undersides of the remaining leaves.
Verification: Check the underside of the leaves visually to ensure the heavy clusters of bugs have been washed away.
2. Inspect Buds and Stems
Ongoing
Carefully examine your colas and stems using a jeweler's loupe or magnifying glass to make sure the pests haven't migrated deeper into the flowering sites.
Confirm no live insects or residual specks remain trapped inside the inner bud structure.
3. Space Out Treatments
Preventive
Give the plant a few days to recover before applying another round of foliar spray to avoid suffocating or burning the foliage.
Ensure leaves remain green and turgid without signs of curling, crisping, or chemical burn 48 hours post-spray.