How to move document library from a team site to communication site?

I'm not sure if enabling features on modern sites is a good idea. If you look at the old style features that have been enabled on the modern team and communications sites then only a very few features are enabled.

Team Sites

- Site collection features: Three-state workflow

- Site features: Access App, Following Content, Site Pages, Team Collaboration Lists, Workflows Task Content Type

Communication Sites

- Site collection features: None activiated

- Site features: Access App, Following Content, Site Pages, Workflows Task Content Type

With taking the modern approach into account of feature free development, I've got the feeling that the feature framework are very close to on their way out (at least for modern sites).

Also, from the past when enabling publishing on a team site is something I've almost always regretted.

Shaishav Merchant, Maybe you could use PnP PowerShell to copy the structure of the library and then use OneDrive for Business to Sync your library locally and then locally copy the content from one library to another.

Also maybe the View in File Explorer may help:

Yes, perhaps one option. I've used publishing features in the past to exercise more control over navigation for example. However, I suggest extreme caution before traveling down this road. Publishing features turn on many features and make (sometimes subtle changes) everywhere, including permissions. Almost impossible to revert. Turning on publishing is, in general, a roach motel.