https://www.cnet.com/news/traces-of-alien-life-on-europa-might-be-found-by-scratching-the-surface/

Jupiter's moon Europa hides a liquid ocean, and perhaps life, beneath a shell of ice around 20 kilometers (12.4 miles) thick, but it might be possible to check for signs of alien biology without having to drill into its dark depths.

Getting that kind of a drilling rig to the outer solar system is a pretty tall order. It would be much easier to send a lander to Europa to scour the surface for traces of organisms that may have worked their way up from their watery habitat to the surface of the ice shell.