For ( setup Microsoft Dynamics 365 FO  on premise Environment) for one of our customers.  I applied all steps from  Microsoft D365 on premise deployment guide document ( https://docs.microsoft.com/en-us/dynamics365/unified-operations/dev-itpro/deployment/setup-deploy-on-premises-pu12 ) for 4 times and completed all  successfully .
but the last step ( Deploy your Finance and Operations (on-premises) environment from LCS
did not complete and took days in running mode without returned with any errors .

I do not know how to check if  it is really deploy or not .
Appreciate your help please