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

+MOVEUP

CS:GO

This command only works in noclip mode and in demos: this command will make you (or your free-roam camera in demos) move upwards. Use -moveup to stop moving upwards.

Syntax
+moveup

Description

This command only works in noclip mode and in demos: this command will make you (or your free-roam camera in demos) move upwards. Use -moveup to stop moving upwards.

Syntax And Arguments

+moveup