See 2.1.0 Release Notes and Upgrade Guide
Microservices release 2.1.0 is congruent with:
Frontend Libraries
AdminWeb 1.10.7
CommerceSDK 1.6.1
Payment JS SDK 1.3.0 (unchanged since last Release Train)
Auth SDK 1.6.1 (unchanged since last Release Train)
Frontend Starters
AdminStarter 1.11.1
NextJS Starter 1.6.1
Open Api 2.1.0