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

SV_MINCMDRATE

CS:GO

This command sets the server's minimum tick rate. This can be used to change the server to 128 tick, in combination with the sv_minupdaterate command. Default is 64 tick.

Syntax
sv_mincmdrate [Tick Rate]

Description

This command sets the server's minimum tick rate. This can be used to change the server to 128 tick, in combination with the sv_minupdaterate command. Default is 64 tick.

Syntax And Arguments

sv_mincmdrate [Tick Rate]
Tick Rate Your desired minimum command tick rate, e.g. 128 ticks per second.