If you're just seeing the demo after migrating, this usually means you're logged in with the wrong account. Try logging in with any other emails you might have used, and check out this FAQ: msft.it/6010ZfgSq! ^NS
Go ahead and check out our Help site in case you can find your solution there: msft.it/6019kWd4v If not though, please reach out to us at msft.it/6010kWd4a so our Tech team can help out. ^NS
You may need to explore new chunks in your world in order to unlock the new components from that latest update. Chunks that were generated prior to the update will not have the newest features available. You may also wish to create a new world to see new features. ^NS
Bedrock versions and Java Edition are written in two very different programming languages, and do not speak to each other. Because of this, cross-platform play is not possible between these two editions of the game. ^NQ
Please visit our bug report site to see if the problem has already been reported: msft.it/6015Z4UF7. You can upvote if the issue hasn't been resolved. If you think you've found a new bug, visit our help site here on how to submit a report! msft.it/6016Z4UFC ^NQ
Sorry about any delay you're encountering! We try to respond to tickets as quickly as possible in the order they were received. We appreciate your patience! ^NQ