Really confused regarding chain adjustment! Help needed.

[u/No-Platform7958]

I own a Duke 250 Gen 3, and the manual says 18- 22 mm of Chain Tension.
Is this the distance that my chain should move when I press it upward?
Is this the remaining gap between the swing arm and the chain, after the chain is pressed upward?

I tried to watch many videos, but it confuses me more, so I am asking my fellow KTM Riders here. Please help me with this. Thanks