Recommendation for eSIM with International Calling from Australia

Hi,

I'm looking for a esim that I can use to make the odd international call from Australia. Calling volume will be low but I'll probably need to make 1/2 phone calls every month.

Are there any suitable suggestions to do this please? Probably will need to call countries like, Fiji, Singapore, Vietnam, Cambodia, NZ, Thailand and similar.

Thank you.