As of [url=https://help.bungie.net/hc/en-us/articles/35597981889300-Notice-Bungie-net-Account-Unlinking-Update-on-March-25-2025]March 25th 2025[/url] the ability to unlink accounts except Twitch from a Bungie profile was disabled. If you disable cross-save, all you'll do is prevent the other platforms from being able to access the characters/gear etc from your active account until you reactivate cross-save. Moving your platform accounts would've had to have been something you did prior to the above date, Bungie will not step in and forcibly unlink or merge the profiles. On Monday, they may pass on that your characters/history etc don't show up on the website on the posting account to the Bungie.net web team as a separate issue though.