Hi lamle, and welcome to Clockify forum!
Currently, it’s not possible to import data (only export), but we plan to add this option in the future.
The only way to import data at the moment is if you write a script that takes data and pushes it to Clockify via API.
It is possible to move entries from one workspace to another within a single Clockify account (but not between accounts), so there might be a workaround in your case.
Since you have been invited using your work email, that’s a completely separate Clockify account. If you haven’t tracked any time on this account you can delete it and then go back to your personal Clockify account and change its email to your work email in your Profile settigns.
This way your email@example.com Clockify account becomes an firstname.lastname@example.org Clockify account.
Then your company would have to invite you again to the workspace they have set up. Once you accept the invite, you will have two workspaces: personal workspace and company’s workspace (but one Clockify account).
Workspaces are completely separate regarding data, so entries from your personal workspace are not visible to users in your company’s workspace, but you can move entries from one workspace to another (you can see here how).