iPhone Mirroring, Siri, Apple Intelligence for Poland?

hard to say about time frame really, apple are not known to share longer term plans with the public

you can suggest they hurry up using their feedback channels Product Feedback - Apple

these forums are user helping other users like yourself, it's sort of going to a physical apple store and asking other customers their advice

This is a user helping users with tech questions forum, we are not apple and apple do not read your posts here

Get Support (apple.com)

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Contact - Official Apple Support

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https://www.apple.com/contact/

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Genius Bar Reservation and Apple Support Options - Apple