Use moved evt.detail.velocity to move lef and, right with the relevant animation LeftStrafeWalk and RightStrafeWalk.
https://github.com/mozilla/hubs/pull/6428/files#diff-a3217779b841e46543be106a881a19d15c31420d70a39c922c0a438535e91e17 code is quite similar to what I'm doing in player-info.