For Western Australia (Vehicle Licence Expiry Date Enquiry)
Just enter the plate number

https://online.transport.wa.gov.au/webExternal/registration/

Thanks, added

I think BAR has moved to the new site: https://www.bar.ca.gov/inspection

Thanks, updated

A few Brazilian plate checks (we don't have to add them all but I am region blocked from placafipe and the other two on our site don't seem to work for me either).

https://buscaplacas.com.br/
https://www.olhonocarro.com.br/
https://brabocar.com.br/
https://www.consultaauto.com.br/ - click blue box "consulta pelta placa"

I could add some indeed, but it would maybe be better to select only the two best ones?
Which ones should replace the two on the site which you say they don't work?

https://provjeravozila.com.hr/en

Croatia. Only if a vehicle has insurance

Thanks, it is added.
Insurance is not mandatory there?

It's mandatory there

^ I think he means if the vehicle is still insured. If the vehicle has a valid plate or had one then it would not pull data if the insurance lapsed.