As additional information to the comment of Tarrow,
in the configuration documentations https://github.com/wikimedia/mediawiki-extensions-Wikibase/blob/9fd56eeff568c752066d0f6f7bc2971282580360/docs/options.wiki
it is written that the customization on multilang-limits affects multilanguage strings

We are waiting for a customisation (changing the number of allowed characters in strings, see this https://phabricator.wikimedia.org/T198108 , which should happen soon thanks to @Tarrow ),
and then we will start uploading data. Thanks.

I would like to re-open the ticket/issue.
I am running and/or have access to several wikibase instances. After loading data via a bot, no data appear to be querable at the wqds endpoint.
I tried different form of queries, even trying all possible form of prefixes modelling them on those available for Wikidata (a bit "out of desperation"). No query and for no prefix reported any result.
Even putting down all services and restarting the machine did not solve the problem on the wikibase instances I can control.

In the (corrected) draft proposal in github each <project_with_grant> has an inception time (when it was submitted, if the data is available), a start and an end time (when the project actually started and when it finished). Each project can benefit from/use (P2283) one or more <grant>, each of which has its own start time and end time. So a project in the model draft can run for a long time and use different grants also in parallel.