The way this report functions (or at least is supposed to function) is that it looks at the highest value detected in your environment for Build, AKA the field that you mention as 10.0.18363.476, and if you are a device beneath that number you show up on the report. In theory, someone has a higher build number than you somehow.
Below is a modified version of this report, with the important piece being that it will show you all devices, including the one that has the highest build number. If you run it, do you end up with anything higher than 10.0.18363.476? You may have to do some creative sorting as Lansweeper gets all weird in trying to interpret the sorting on these types of numbers.
Also, you are a brave person for hopping on 1909 so early in its life cycle!
Select Top (1000000) SQ.icon,
SQ.AssetID,
SQ.AssetName,
SQ.OS,
SQ.Build,
SQ.[OS Version]
From (Select tsysOS.Image As icon,
tblAssets.AssetID,
tblAssets.AssetName,
tsysOS.OSname As OS,
tblAssets.OScode + '.' + tblAssets.BuildNumber As Build,
tblAssets.Version As [OS Version],
tblAssets.Domain,
tblAssets.Username,
tblAssets.Userdomain,
tblAssets.IPAddress,
tblAssets.Description,
tblAssetCustom.Manufacturer,
tblAssetCustom.Model,
tblAssetCustom.Location,
tsysIPLocations.IPLocation,
tblAssets.Firstseen,
tblAssets.Lastseen,
Cast(Replace(Replace(Replace(tblAssets.OScode, '.', ''), 'S', ''), 'R',
'') As BIGINT) As OsCodeNumeric,
Cast(tblAssets.BuildNumber As INT) As BuildNumber
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysOS On tblAssets.OScode = tsysOS.OScode
Left Join tsysIPLocations On tblAssets.LocationID =
tsysIPLocations.LocationID
Where tsysOS.OSname = 'Win 10' And tblAssetCustom.State = 1 And
tblAssets.BuildNumber Is Not Null) SQ
Order By SQ.AssetName