Hi @Vedant Kulkarni,
Here is how to tell if you are in an Next-Gen project:
From your project sidebar, select Project settings. If you see a Features item in your project settings, then you are in a next-gen project. Select the Features item and you'll see some toggles. This is just one of the things that make next-gen projects unique, the ability to toggle features in one click without multiple layers of settings.
If you see a Summary item in your project settings, then you are in a classic project. The Summary page shows all the advanced configuration and various schemes used to manage your project. It's powerful stuff, but can be a bit overwhelming if you're not used to it.
You can find more information on it in this article:
There isn't anything that defaults in the project list that differentiates between Next-Gen and Classic projects. You have to look at each one individually. But...if you add "Next -Gen" as a Category in the project details you can sort using the Category field.