Tacho broken? Helpee

Hello dear community, desperate I have signed up here! I have been Mazda owner since October 2022 and was totally satisfied. In December overnight, it started to work both radio keys no longer. However, I can open the doors with the key and start engine. 1 day later, the tacho lighting did not go any more, as well as the speed indicator. Subsequently, several errors appeared in the speedometer and the servo did not work. I noticed when I press horn that does not go, but the error messages jump away only engine control light remains on as well as tire air pressure! Driving it is quite normal no power loss otherwise what. I was in several workshops and they found nothing. I am totally desperate who can help me ?