I would like to add existing vm rds host 2019 to new rds farm in azure in marketplace but in azure it ask for new rds farm setup , new broker new rds hosts new gateway and web role,licensing role

Hi experts,

I have existing  one rds host server 2019 that have remote host role and licensing role  as virtual machine  and because we have more users we have planned to setup rds farm  so I found that there  are ready rds farm in azure  as follows:

https://azure.microsoft.com/fr-ca/resources/templates/rds-deployment/

 I would like to add this host to rds farm  in azure in marketplace  but in azure it ask for new farm rds setup  so (new broker, new rds multiple  hosts, new rdp gateway and web role,licensing role )
as I need to import existing rds host server and licensing  to this server farm .

I would like to import existing rds host as virtual machine in azure as  one of rds hosts ready for  installation in azure market place so  not to install application again. and after import old rds host ,Do I need to install all applications on other hosts?

waiting for your kind advice,