If you did not complete the PC Migration from Battle.net to Steam prior to the December 1, 2020 deadline then nothing can be done at this point.
https://help.bungie.net/hc/en-us/articles/360054862491-PC-Migration-and-Battle-net-Login-Ends-December-1-2020-at-9-AM-PST
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Well I had completed the migration and I logged in on steam and my characters were all there so idk what happened. And I don’t care as much about the characters it sucks but if there’s nothing to be done then that’s fine I just don’t want to have to pay for the dlcs again