When i first started playing apex i came from the game mostly everyone has played which is fortnite. And i started out there as a mobile player and always had the option to switch platforms and still...
Unfortunately Apex Legends doesn’t have cross progression, so items and saves will not be transferred across platforms.
I don’t know the reason behind this because it’s the only BR I know of that doesn’t have this feature. Hopefully in the near future it might be a thing.