TREX is fine for RTX3060 using Windows Developer Unlock, I even dual mine with it:

Mining at eu1-zil.shardpool.io:3333, diff: 4.29 G
GPU #0: ASUS NVIDIA RTX 3070     - 62.28 MH/s, [T:60C, P:162W, F:60%, E:421kH/W], 23/23 R:0%
GPU #1: ASUS NVIDIA RTX 3070     - 62.28 MH/s, [T:57C, P:162W, F:60%, E:424kH/W], 23/23 R:0%
GPU #2: Gigabyte NVIDIA RTX 3070 - 61.92 MH/s, [T:56C, P:183W, F:60%, E:371kH/W], 15/15 R:0%
GPU #3: MSI NVIDIA RTX 3060      - 49.04 MH/s, [T:42C, P:110W, F:55%, E:486kH/W], 12/12 R:0%
Hashrate: 235.51 MH/s, Shares/min: 2.356 (Avr. 2.695), Avr.P: 563W, Avr.E: 418kH/W
Uptime: 27 mins 13 secs | Algo: ethash | T-Rex v0.20.4
WD: 27 mins 15 secs, shares: 73/73