LWC component as Tab

 We can use the LWC component as a tab. All we need to do is, 

include "<target>lightning__Tab</target>" tag in ".js-meta.xml" file.

Please see the below syntax:

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>50.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__Tab</target>
    </targets>
</LightningComponentBundle>