Hi,
As provided by the Q&A Assist, I can confirm that the language isn't supported yet as of now. Similar requests have been brought up before, but it probably haven’t reached enough demand yet for Microsoft to prioritize adding it. You may check these past threads:
These languages support voice typing in Windows 11:
Greek Language Support for Voice Typing in Windows 11 - When will it be available?
As mentioned in the threads above, it’s best to keep submitting requests through the proper channel using the Feedback Hub app (Windows + F). Requests need to have enough upvotes for this to get considered in the future.