Kkova112
Were any of your platform accounts relinked from an EA Account? (e.g. unlinking your PSN from one EA Account and linking it to another)
Even if they are currently linked to the same EA Account, if they ever were relinked after you made progress, then whatever progress you made would've been left on the previous EA Account.
I don't want to make you repeat yourself, so sorry for asking, but I just have to make sure, have your PSN and Steam account always been linked to the same EA Account?
If they have been linked to the same EA Account for a while and you have not received any data between platforms from cross progression, then it could be potentially something else. If I recall correctly, some unlucky players did have their progress lost during cross progression, but they did receive a lot of Apex Coins, Crafting Materials & Legend coins to compensate for it. Have you received a lot of currencies since then? If so, that might explain what happened. (In that specific case, the progress cannot be reverted sadly enough)