Not seeing new thermostat card in updated HA-Version - only in a new installation

I just upgraded the last HA Version. Why i can not see the new thermostat card design from the 2023.9-11 Version ?

I have another HA Installation (a new installation) - there can i see the new card styles?

Is there an option, i have to set, to see the new card designs?

Clear your web browser or app cache.

No improvement. It is also the same on several computers/iPads, only the “completely reinstall” HA shows the new cards. Restart etc. of course already tried everything.

Are the YAML code the same and the theme of your HA?

the theme is the same (HA Theme) - but the yaml code mybe not (i dont know, but i have in the “old” HA mqtt and other configuration, the new one is only for testing…

Where can i see in the yaml, if there is a problem with the “thermostat cards”?

When you edit the card, then there should be three dots somewhere, under which you can select to edit in YAML.