Hi @ESHA MOHAN ,
Very sorry that I did not reply in time. I've done a lot of research and attempts these days, unfortunately, no usable solution was found. Perhaps, you could try going to Partner Center to get some help. At the same time, we also recommend that you go to feedback on this issue, this is the best platform to let us hear from you and make our products and services better for you and others. The more votes, the easier it is to be seen. https://sharepoint.stackexchange.com/questions/259475/how-to-add-a-mailto-link-or-button-to-modern-sharepoint-page#:~:text=Click%20on%20%2B%20from%20section%20where,text%20in%20Text%20to%20display%20.
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