Sorry that some of your presets are missing. However, we'd need some more detail about the problem.
Are you referring to the missing ACR presets? Which version of camera raw are you using?
If the Lightroom develop presets are missing since the 7.3 version update, please take a look at the workaround mentioned here: Not all presets are converted to the new format after upgrading
Let us know how it goes.
this is a screen shot from Lightroom 7.3
This is from camera raw 10.3 from Adobe Bridge
The other presets like Classic- B&W filter is local to Lightroom and not part of ACR presets. Camera raw also have some presets that are not part of the Lightroom app, only your custom presets will show up in any of these apps.