Hi, Sourav! Thanks for your interest in being one of our integration partners.
The team is prioritizing integrations based on customer requests, so we will add this to our list of possible integrations. At the moment, we cannot provide a timeline for when any specific integration will be added.
FYI - I use ClickSend in Glide using Zapier and it works great, but having it available directly as an integration will be THAT much better! ClickSend is a great product/service!