In OpsManager 3.3+ there's a new feature which enables tile parallel deploys as described in this doc https://techdocs.broadcom.com/us/en/vmware-tanzu/platform/tanzu-operations-manager/3-3/tanzu-ops-manager/parallel-tile-deploys.html
The advantage of this feature is ability to reduce time needed to build an environment or recreate it.
The parallel deploy feature depends on tiles declaring their support for parallel deploys - a new property added to metadata.yml, as shown in https://techdocs.broadcom.com/us/en/vmware-tanzu/platform/tile-developer-guide/3-3/tile-dev-tanzu/property-template-references.html#-supports_parallel_deploys
supports_parallel_deploys: true
The majority of the tiles (Hub, Postgres, Mysql) already have this property added. This setting deploy-in-parallel: true can be reviewed or set using command API (or command om configure-product -c )
In Single Sign-On (SSO) tile property has been added and it will be part of the September release train. (Expected to be completed at the end of the month).
Spring Cloud Gateway (SCG) tile is under review to add supports_parallel_deploys property.