Hi @Srikanth ,
According to my research, currently there is no way to add services on web front server in SharePoint 2019 farm.
The Web Front End (WFE) server is a server that handles web page requests from users. Thus, each time the user opens a SharePoint page in a browser, it is processed by the WFE server. SharePoint farm may have several such servers. In this case, Network Load Balancer is distributing requests between them. It is the way to scale SharePoint.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.