About crossplay/cross save

Will it be aver possible to allow cross save on all the platforms on "owned" content?

I mean, if i buy the base game on switch, for example, and i have all dlc with full perks characters on pc, i could be able to have the base game characters as those on pc, when and if i buy the dlc on switch than, i just unlock them exatly as they are on pc...

Can this be done?

I hope i explained myself correctly (my english is not that good)

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