@MrSlave,
It appears you cannot. All I could find (HP specs, Crucial RAM Upgrades, etc.) was 2 x 16GB DDR4 PC4-25600 (3200 MHz) Unbuffered NON-ECC for a total of 32 GB RAM max.

Additional HP Victus 15L TG02-xxxx User check: UserBenchmark: HP Victus by HP 15L Gaming Desktop TG02-0xxx Compatible Components.
Truth be told, 32 GB is quite sufficient for serious gaming especially paired with an i7-12700 and a GeForce RTX 3060 Ti graphics card.
Kind Regards,
NonSequitur777
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