Thanks @Vaibhavi_J for your reply.
We have already configured the Externalizer service for author instance. I can see below logs in error.log
09.06.2021 01:48:10.831 *WARN* [10.75.29.86 [1623224890817] GET /content/experience-fragments/test/test3/master/_jcr_content/contexthub.commerce.orderhistory.json HTTP/1.1] org.apache.sling.scripting.sightly.js.impl.jsapi.ProxyAsyncScriptableFactory Script /libs/wcm/foundation/components/page/headlibs.js uses the deprecated asynchronous API provided by the 'granite' namespace. Please refactor the script to use the synchronous API provided by the org.apache.sling.scripting.javascript bundle.
09.06.2021 01:48:10.841 *WARN* [10.75.29.86 [1623224890817] GET /content/experience-fragments/test/test3/master/_jcr_content/contexthub.commerce.orderhistory.json HTTP/1.1] org.apache.sling.scripting.sightly.js.impl.jsapi.ProxyAsyncScriptableFactory Script /libs/wcm/foundation/components/page/body.js uses the deprecated asynchronous API provided by the 'granite' namespace. Please refactor the script to use the synchronous API provided by the org.apache.sling.scripting.javascript bundle.
09.06.2021 01:48:10.856 *WARN* [10.75.29.86 [1623224890817] GET /content/experience-fragments/test/test3/master/_jcr_content/contexthub.commerce.orderhistory.json HTTP/1.1] com.day.cq.wcm.msm.impl.LiveRelationshipManagerImpl StarResource given at /content/employee/en_us/errors/404/jcr:content/footerIPar/*: no parent: no LiveCopy
09.06.2021 01:48:10.870 *INFO* [qtp565643093-496864] reuest.log null
09.06.2021 01:48:11.211 *INFO* [qtp565643093-497090] reuest.log null
09.06.2021 01:48:11.556 *INFO* [qtp565643093-496864] reuest.log null
09.06.2021 01:48:11.815 *INFO* [qtp565643093-496180] reuest.log null
09.06.2021 01:48:12.160 *WARN* [10.75.29.86 [1623224892157] POST /libs/cq/experience-fragments/content/commons/targetexporter.html HTTP/1.1] org.apache.sling.engine.impl.request.RequestData SlingRequestProgressTracker not found in request attributes
09.06.2021 01:48:12.166 *WARN* [10.75.29.86 [1623224892157] POST /libs/cq/experience-fragments/content/commons/targetexporter.html HTTP/1.1] org.apache.sling.scripting.sightly.js.impl.jsapi.ProxyAsyncScriptableFactory Script /libs/wcm/foundation/components/page/head.js uses the deprecated asynchronous API provided by the 'granite' namespace. Please refactor the script to use the synchronous API provided by the org.apache.sling.scripting.javascript bundle.
09.06.2021 01:48:12.174 *WARN* [10.75.29.86 [1623224892157] POST /libs/cq/experience-fragments/content/commons/targetexporter.html HTTP/1.1] org.apache.sling.scripting.sightly.js.impl.jsapi.ProxyAsyncScriptableFactory Script /libs/wcm/foundation/components/page/headlibs.js uses the deprecated asynchronous API provided by the 'granite' namespace. Please refactor the script to use the synchronous API provided by the org.apache.sling.scripting.javascript bundle.
but these seems to be warnings only. Let me know your thoughts on this.
Thanks