Hoi and unfortunately no, Dual Sim means that you have 2 SIM card slots and could use the Sim and a subscription from 2 providers. The sim slots are rarely if ever compatible with micro SD cards. From what I read, you can't expand this Oppo with additional memory.
Hope that helps. Happy Holidays and LG
You should never rely on Digitec's specifications.... Unfortunately, you often make mistakes here...
Primarily I would always go by the manufacturer's site and otherwise I can recommend this site for smartphones:
https://www.gsmarena.com/oppo_find_x3_neo-10787.php
Bluetooth® v5.2, BLE, TWS+
Btw, when does it matter?
Only the manufacturer's data sheet tells you what's inside.
https://www.oppo.com/chde/smartphones/series-find-x/find-x3-neo/specs/