Migrating Outlook folders from old to new laptop Windows 11

Much depends on the account type that you are using on your old laptop. It sounds like this was a POP3 account. In that case, your data is stored in a pst-file.

To find out the location of your pst-file use;
File-> Account Settings-> Account Settings...- tab: Data Files

Close Outlook and copy over the pst-file to your new computer. Make sure you do it to a location to which you have read/write access and that it isn't a location which is synced with Cloud Storage such as OneDrive or Dropbox.

Then on your new computer, you can connect to your pst-file via;
File-> Open & Export-> Open Outlook Data File...

For more details, step-by-step instructions and screenshots see;
Backup and Restore all Outlook data - Robert 365