@Nishchay21 You can refer the referenced thread for more details about discontinuation of this resource.
To summarize, if you already have a classic workspace created before Dec 1, 2021. You can continue to use it and create resources, however this workspace will only be available till 31 Aug, 2024. You can create experiments and endpoints on an existing classic workspace if it is created before Dec 1, 2021. I hope this helps.
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