NB! It seems this console command is not compatible with CS2.
Command Profile

SV_MINUPDATERATE

CS:GO

This command sets the minimum update rate for the server. This can be used in combation with the sv_mincmdrate command to change the server's tick rate (e.g. to 128 tick).

Syntax
sv_minupdaterate [Tick Rate]

Description

This command sets the minimum update rate for the server. This can be used in combation with the sv_mincmdrate command to change the server's tick rate (e.g. to 128 tick).

How To Use sv_minupdaterate

  1. Enable the developer console in Counter-Strike settings.
  2. Open the console with the tilde key (~).
  3. Enter sv_minupdaterate [Tick Rate], replacing bracketed arguments with the value you want, then press Enter.

This legacy command is not currently listed as compatible with Counter-Strike 2.

Syntax And Arguments

sv_minupdaterate [Tick Rate]
Tick Rate Your desired minimum update rate, e.g. 128 ticks per second.