Hi Everyone,
Here is more than 150 SDF Nodes…
I follow CelestiasMaze on Twitter,
Hi has a full fledge library of SDF for the shader node (2D and 3D SDF). But it can be converted auto-magically to Geo-Node with an addon, here 
If you want to convert your mesh to SDF, just use that node setup (From Erin ETK toolkit). I encourage you to buy it since it is very good !
If interested, you can also found many node pack setup (free & paid one) here
Cheers !