Welcome and thanks for posting in the Community, @parthaimprint.
In QuickBooks Online (QBO), the option to make a quotation is currently unavailable. However, you can use and customise the Estimate template and change its name to Quotation.
After that, you can now create or make a quotation. Refer to this article for more information: Set up and use estimates.
To learn more about customising estimates/quotes and other sales forms in QBO, I suggest checking out this article: Customise invoices, estimates, and sales receipts.
I recommend visiting our Blog site. This is where we share recent happenings and future developments, such as updates to newly added features. Here's the link: https://quickbooks.intuit.com/blog/.
Reach out to me in the comment section below if you have any other questions or concerns. I'll be here to help. Have a good one!