These are the settings of the flow object and the domain object.
I think I got all the settings right but every simulation I bake does not show the fluid. I tried restarting blender but it keeps doing this. I checked the 'liquid' tick box and it was enabled. I just can't see anything even the atom-like particles. What could be the problem?
Increase with the Resolution Diverges. Higher resolutions allow it to detect thinner, smaller objects. (For small objects, resolutions like 512+ may be needed and can take a while depending on your computer).
As well as baking the data, you also have to bake the mesh. Scroll down a little to get to the Mesh section:
I have faced the same problem and I've solved it by setting the Surface Emission property to a non-zero value. You can find it by going to the Physics tab of the flow emitter object, scrolling to the Fluid modifier section (here Type will be Flow), then finding the Settings > Flow Source > Surface Emission field).
All tutorials I've watched either skip over the property completely or say that zero means the volume of the fluid will be that of the flow emitter object. I have not found this to be the case, at least not in Blender 2.91.0 which is what I'm using. I couldn't get the flow to show up no matter what I tried until I set this value to 1 and then it all magically worked.