Sam looks to be returning. She had entered doubles in the Portugal 25k next week with Mariam Bolkvadze, but as she has no ranking she was automatically withdrawn from the advance entries. I thought she would have a protected ranking, unless she's chosen not to use it just yet.
I'm sure you know how it works, but others may not, so here is my take.
Sam should have a special ranking (as the WTA call it) for doubles, but anyway isn't using it here. She was ranked around 400 at the time of her last tournament, so her SR should be in that region.
There is a limit of seven advanced entries for doubles which is why she missed out.
Sorry, the WTA website jumps about and switches from singles to doubles at will when you look at weekly rankings. She was around 400 singles and 80 doubles.
Back to pro tennis, after maternity leave, and time off before, now age 35 - and she takes the doubles title in her first event back ! (the 25k in Spain, playing with Olivia Gadecki)