It is not supported for setting up teams and project administrators when a project is created, but you can do these using two REST APIs after the project is created.
Azure DevOps will set a default team when you create a project. The default team will be named "{project name} Team". To create a new team, you can use the following API:
POST https://dev.azure.com/{organization}/_apis/projects/{projectId}/teams?api-version=5.1
Click this document for detailed information.
Azure DevOps sets the person who creates the project as the first administrator. To add a new administrator, you can use the following REST API
PUT https://vssps.dev.azure.com/{organization}/_apis/graph/memberships/{subjectDescriptor}/{containerDescriptor}?api-version=5.1-preview.1
Click Memberships-Add for detailed information. You can refer to this relative question for the specific operation.
{memberId}with{teamId}. - Jane Ma-MSFT