I currently have two stack exchange IDs, one linked to my old google ID with all my rep and accounts on multiple stackexchange sites. While another that is linked to my new gmail ID. I wanted to merge the two so I could start using only one gmail ID (the new one).
However no where is it explicitly mentioned whether all community accounts (stackoverflow, graphic design, UX design) etc would be merged or whether each one needs to be merged separately.
I currently have accounts with the following sub communities
There are even more, but these are the most active ones. I am confused if there's a way to do it for all in a single go, or all have to be done manually.
This was even asked in the comment section here but went unanswered.