No — each ByeRoaming eSIM plan is for one device. After you install the profile on a phone, you generally cannot move the same plan to a second phone. Buy a separate plan for each traveler or device.
You can still install multiple different eSIM plans on one compatible phone (up to the device limit) and switch which line uses cellular data. Hotspot lets other devices share that phone’s connection without a second eSIM.
If install fails after a device change, see Why is my eSIM not working?.