Are you a returning seller? Looks like you've had a bit of a break from selling and returned.
Sudden selling activity on a dormant account raises red flags to eBay, as it could be a sign that hackers have hold of the account, so for security reasons money is held for a longer period , can be 21 days, to ensure the genuine seller has returned, that no item not received cases are opened.
Tracking showing delivery for items can help, too.
@iwantthat2020