Nokia 1.3 and Nokia 2.1 are receiving new security patches for June, while Nokia X20 got a fresh Android Build update V1.270 with a May security patch. The update for 1.3 and 2.1 is 104 MB and 40.23 MB in size, respectfully, while the new Build update for X20 is 399 MB large. The update for Nokia 2.1 could very well be the last monthly security patch delivered since the device was announced in May 2018. Now the owners should get the patches with quarterly updates.
The new build for the latest best that Nokia Mobile announced is probably bringing some UI fixes and system improvements. It would be nice to know a bit more details of what has been fixed in X20, but that is not the case here. If you are using X20, do come back with all the noticeable changes that the update brought.