my team has been making consistent progress in the last few weeks and wanted to check how far is "Tig" to get upgraded to regular Wikipedia,
do we need to submit an official request for review, what are the remaining tasks,..., etc. As far as I can tell it now has simillar number of articles, translation, ...,etc to a sister language, ti.
Also there are lots of features (such as translation) available in regular Wikipedia that could have helped building the site.

which set belongs to Wikidata interface, i.e. Wikibase client, Wikibase Lexeme, Wikibase repo?

sure, will do

please help me understand what we should expect after the above mentioned change, I have been checking and didn't see the language is added to the interface yet

The language is now 13% MediaWiki core messages translated, how can we request language support to be added

We are requesting support for label

@jhsoby thank you for the advise, I am continuring to translate. When the language is added for all purposes, is Wikipedia also included. It would be nice to include that?

The language code tig
Language name in the language itself or English: Tigre
The used script, if not obvious: Geez script
Where and when the language was or is used: by Tigre speakers in Eritrea and Sudan, East African