[SingleType / Performance] Is it possible to query for all available language versions of a SingleType in one API call?

For Strapi3 does not work; only returns a single item togethjer with the localizations property filled out; see below:

call single-type-entity?locale=*

same for using _locale btw

response

{
"id":1,
"variable" ...
,"localizations":[{"id":2,"locale":"en","published_at":"2021-10-19T06:55:24.387Z"},