I check the bundles every day to buy bundles of physical games when they go on sale as I’m a pensioner and it’s the most affordable way to buy games and support the creators for me.

I never saw the California Fire bundle and missed.  Huge deal (https://itch.io/jam/california-fire-relief-bundle) of 400+ games

Are all the bundles listed when you open itch.io and click on bundle and co-op bundle? Or is there another way to search for bundles?

I definitely would have bought this one and never saw it even though I check every day for bundles of physical games to print and play 

Some bundles are usually hidden especially large ones when they contain either a delisted game or a game that is marked as NFSW. To ensure you view all the bundles on the bundle page, turn this on from the Settings page: 

You will have to scroll down a bit before you find it.

Please note this will enable viewing of NFSW (Adult Content).

thank you