LG Refrigerator temperature high ~56 degrees. Freezer and ice-maker making ice.

[san]

LG: LFXC24426S

Purchased new 2014. Compressor replaced 2020.

Problem: Freezer and in-door icemaker are making ice Freezer is cold.
Fridge however is struggling to go below 50 degrees.

Test done so far and obsrvation:

1) Compressor Ok as water kept in ice-tray in freezer makes ice and ice-maker in door also making ice. (Is this a fair assumption?)

2) Opened refrigerator back panel and I don't see any frost on the coli's. It feels cool to the touch but no frost at all. (is this an issue?)
3) When put in test mode #1 (which is supposed to turn on all fans), the fan on the back panel comes on. However I don't see the fan turning on when the door is closed (tested by recording using phone with door closed).

4) The defrost sensor (6615JB2005N) is ok as it is showing correct resistance 16K at 56 degrees. Resistence increases when i put sensor into glass of ice water.

5) No error code displayed on door and no blinking of LED on the motherboard.

Suggestions on anything else I can check.
Could there be a issue with sealed system even if the freezer and ice-maker are making ice.

Thank you for your time in advance.