What hardware affects Installation speed for steam games?

Recently when installing Marvel Rivals after the download completed, my install speed took nearly as long/longer as the download time. I have it on my NVMe drive not the hdd for context. Not that it would matter but my internet speed is 300-400 megabits.

I was wondering what hardware components specific to steam affect the install speed.

CPU Ryzen 5600x
16gb DDR4 3600mhz Ram
Intel 660p NVMe Drive or Adata XPG SX8200 1 tb NVMe
RTX 3070

Above are my current specs, only difference is i have a 3070, but that wouldn't really have much to do with install speed i don't think.

I'm considering upgrading some pc parts, but just wondering what would better my install speed.

Wasn't sure if it's my NVMe drive, CPU, or any other component I might not have thought about