Yes! This is very much encouraged! Some reading material…
https://forum.inaturalist.org/t/does-anyone-else-get-bothered-by-how-many-observations-are-marked-as-unknown-species/31896
https://forum.inaturalist.org/t/coordinating-identification-of-unknowns/24572
https://forum.inaturalist.org/t/poll-how-many-people-seek-out-unknown-observations-to-id/6749/8
https://forum.inaturalist.org/t/best-unknown-finds/29009
https://forum.inaturalist.org/t/amount-of-unknown-records-is-decreasing/8594/59
https://forum.inaturalist.org/t/identifriday-is-the-happiest-day-of-the-week/26908
Be aware of this though…
https://forum.inaturalist.org/t/why-do-some-serious-power-users-add-so-many-unknown-observations/282/8
It’s sometimes a good idea not to identify unknowns if they’ve only just been posted
There are also ‘boilerplate’ paragraphs you can adapt to explain things to any users who might question what you are doing. They can be found here