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

CHANGELEVEL2

CS:GO

This command changes the map you're playing on into a single player instance. Doing this can cause the map you're trying to load into to freeze.

Syntax
changelevel2 [Map Name]

Description

This command changes the map you're playing on into a single player instance. Doing this can cause the map you're trying to load into to freeze.

How To Use changelevel2

  1. Enable the developer console in Counter-Strike settings.
  2. Open the console with the tilde key (~).
  3. Enter changelevel2 [Map Name], 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

changelevel2 [Map Name]
Map Name The name of the map you want to switch to in it's technical form. Here is a full list of map codes.