Hello @SMukhhopadhya !
Creating UI extensions with React is currently in beta phase.
You can follow this link to see your status:
https://app.hubspot.com/product-updates/<Your Portal ID>/all?query=react
You need to go to your HubSpot accounts’ “Product Updates” and look for this one, then join the beta:
References:
- Opt an HubSpot account into a beta feature
- https://developers.hubspot.com/docs/guides/crm/ui-extensions/create
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