Program Member Custom Fields went GA in June 2020. As of Q4 2020, support for these fields in tokens is in closed beta. To join this beta, please contact marketoengage-pmcf-beta@adobe.com (a colleague in product management is managing this now). Campaign Member Sync with Salesforce is still on the roadmap but I don't have an ETA. You can submit this question to the email above too. Thank you.
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