I just bought a license for Pico-8 via itch.io, was wondering if there was any way to link that here or not? I only see options for Humble Bundle.

Yeah, I don’t think you can link Pico 8 on itch.io because there is no key to copy and paste :(

are there plans to enable importing from itch.io?

had the same question on my mind but then I was wondering what's the benefit of linking anyway?

there were plans when pico-8 was added to itch for the big bundles, but they haven’t materialized