[marsokod]

That's the thing we need. If your satellite is operating and in Low Earth Orbit, it is extremely easy to avoid a collision, even without any propulsion system.

If you are aware of the risk of collision a couple of days in advance, just changing your satellite orientation for a couple of orbit will retire the risk of collision.

You may want to perform in-orbit servicing, but that is more about increasing the longevity of your assets in orbit or increasing their capabilities via refueling/upgrading/repairing.