You'll need to be signed up for managed payments

https://www.ebay.com.au/help/selling/getting-paid/registering-seller?id=4792&srsltid=AfmBOooYPKuNLoq0EaG7in80VuGiB7M0lZtSJV5YrOB95rdqvhFmIeOi

Did you scan the QR code when it was picked up, as after you're registered to sell,, that may release your payment a bit earlier than 30 days

https://www.ebay.com.au/help/selling/posting-items/setting-postage-options/local-pickup?id=4181&srsltid=AfmBOophWyOPZ1e82BYH4RzCqtAMiJDBa-aAmHC5jdLTvLrTy2NwoRxo

Unless the buyer pays in cash, you must be signed up and verified for Managed Payments to receive your money.

https://www.ebay.com.au/help/selling/getting-paid/getting-paid-items-youve-sold?id=4814&st=3&pos=1&query=Getting%20paid%20for%20items%20you%27ve%20sold&intent=getting%20paid&lucenceai=lucenceai&docId=HELP1448

They pay, after any hold period, into the bank account you gave them when you signed up for Managed Payments