This video will help you out check it out it’s really easy acualy to transfer data it seems hard in the beggining i also did think that but if you understand the normal datastore then you will understand all the transfer data video it’s a more advanced scripting thing but if you learn it it will become easy.
Tip: try to make a script that saves data before getting teleported to the next place
I was able to get a JSON version of my data saved in datastores in the past then paste them directly into my other game. I found this thread with a similar issue as you.
I’m not sure it’s possible besides that but it’s 100% possible between two places like @DevTurtIe mentioned.