Hi, Maryam!
In case you have blocked certain accommodation, the accommodation type will still be available in availability search, since there may be other accommodations assigned to it: https://prnt.sc/spuqkg. If this is not the case and you have only one accommodation assigned to the accommodation type, you should make sure you are using [mphb_availability id="777"]
shortcode, and not the [mphb_availability_search]
, since the latter one checks availability for all the accommodation types you have, not specific accommodation type.
Regards,
Andre