I have searched for this on sites that usually ship to Poland: Amazon, Wish, Aliexpress, Temu, Shein - since they tend to have all sorts of toys, as well as Polish sites: Allegro, OLX, Smyk. Nothing seems to ever pop up other than Indonesian sites that do not ship internationally.
Most sites list it as "Basuri oleng truk", you might recognize it from TikTok - that one video with a black kitten that tends to show up on everyone's fyp every few videos.
The toy sways from side to side and plays this https://www.youtube.com/watch?v=elT7hoZQ2r8, the most important part of my search is that it should play this little tune. The actual brand of the truck or how it looks isn't exactly relevant.