Renata, KK for the TC55 has not yet been released. It is currently only available for the beta users. FCS of April 22 was targeted for EMEA, LATAM May 22, NA is planned for the beginning of June. Keep in mind these are AOSP NON-GMS. The HW is the updated 2D scan engine versions. OS Update images for Rev A 1D scanners should follow after.
the BSP is still not yet posted on our support site:
You'll find there, hopefully, shortly.
If you've an urgent need and you're a registered partner, you can contact your local pre-sales engineer (Poland? should be firstname.lastname@example.org) to see if a beta version can be an option in your case.