Do other siblings have any rights if there is a PoA?

In general, a Power of Attorney (PoA) grants specific authority to the designated agent to act on behalf of the principal, which may limit the rights of other siblings regarding the principal's affairs. However, siblings may still have rights to be informed about the principal's well-being and financial matters, depending on the laws in their jurisdiction. Additionally, if the PoA is misused or if conflicts arise, siblings can seek legal recourse to protect their interests. It's advisable to consult with a legal professional for specific guidance based on individual circumstances.