Hi @CaptainAmirAli,
The marketplace is a transaction for 3rd Party Developers in which Microsoft does not control the content. If that developer did not include the checklist, you may try their website to see if they have a checklist or ask them there.
Support for Carenado:
https://carenado.zendesk.com
Carenado Website:
https://www.carenado.com/sitecarenado/