This is from MySwissAlps (an unofficial source):
It looks like all countries that are currently still on Switzerland's
'high-risk country list' will be removed from this list by May 2 2022.
This would mean that from May 2, normal entry rules apply to all
travelers as they were before the pandemic. Proof of vaccination
and/or recovery shouldn't be required anymore.
https://www.myswissalps.com/forum/topic/does-the-corona-virus-affect-trips-to-switzerland/page/53
This will mean no more proof of vaccine to enter the country. A relief to those concerned about the 270 day time-limit on the vaccine.
NOTE: I don’t like to post without having an official source, but I know many have been waiting for this news. Once I see the change reflected on the official Gov. website, I will post a link.
Edited to add link to gov. site (look under "entry"):