Where can I see an overview of upcoming Layer 2 chains that aren’t launched yet?

Where can I find an overview of upcoming Layer 2 chains that haven’t launched yet?

I’m trying to stay ahead of the curve and keep track of Layer 2 solutions that are still in development or planning stages but haven’t launched yet. With all the innovation happening in the Ethereum ecosystem and beyond, it’s hard to know where to look. Is there a reliable source, tracker, or community resource that regularly updates upcoming L2 projects? Would love to hear what tools or sites others are using to stay informed.