23M, 3 months lifting — feedback on my updated 4-day Upper/Lower split?

23M, been lifting consistently for around 3 months. Main goal is hypertrophy/aesthetics, with back and arms as my priorities, while still wanting balanced overall development.

I train 4x/week. Recovery has been good, no injuries or limitations. Most compound sets are around 1–2 RIR, isolations around 0–2 RIR, and I use double progression.

Current routine:

Monday — Upper A

Close/Neutral-Grip Lat Pulldown — 3×10–12
Preacher Curl Machine — 3×10–12
DB Flat Bench Press — 3×10–12
Seated Cable Row, V Grip — 3×10–12
Overhead Cable Triceps Extension — 3×10–15
Machine Chest Fly — 3×10–15
Single-Arm Cable Lateral Raise — 3×10–20
Decline Crunch — 3×10–15

Tuesday — Lower A

Leg Press — 3×10–12
Smith Machine RDL — 3×10–12
Leg Extension — 3×10–15
Seated Leg Curl — 3×10–15
Smith Standing Calf Raise — 3×10–15
Smith Machine Hip Thrust — 3×10–12
Cable Crunch — 2×10–15

Wednesday — Rest

Thursday — Upper B

Chest-Supported T-Bar Row — 3×10–12
DB Hammer Curl — 3×10–12
Incline Machine Chest Press — 3×10–12
Medium-Grip Pronated Lat Pulldown — 3×10–12
Overhead Cable Triceps Extension — 3×10–15
Single-Arm Chest-Supported Reverse Fly Machine — 3×10–20
Single-Arm Cable Lateral Raise — 3×10–20
Cable Crunch — 3×10–15

Friday — Lower B

Leg Press — 3×10–12
Smith Machine RDL — 3×10–12
Leg Extension — 3×10–15
Seated Leg Curl — 3×10–15
Smith Standing Calf Raise — 3×10–15
Smith Machine Hip Thrust — 3×10–12
Decline Crunch — 2×10–15

Saturday/Sunday — Rest

A few choices are intentional:

* Upper A cable row is more lat-biased with tucked elbows.
* Upper B T-bar row is more upper/mid-back biased with a slightly wider elbow path.
* I’m using preacher curls + hammer curls for biceps/overall arm development.
* I kept overhead cable triceps extensions twice per week because I like them and they seem to have good hypertrophy evidence.
* Chest is split between flat DB press, incline machine press, and machine fly.
* Lower body is intentionally pretty machine/Smith-heavy because my main goal is hypertrophy rather than barbell strength.

Would you change anything regarding:

exercise selection, order, weekly volume, redundancy, frequency, or rep ranges?

Especially interested in feedback on whether I’m doing too much or too little for back, lats, biceps, triceps, and shoulders.