Hi and welcome to OSM!
I've noticed this changeset because of the landuse=residential area which is also tagged with highway=crossing:
way/418545628
Please be very careful with Go Map!, I see quite a lot of these errors produced with this app.
I also see many nodes with lamp_type=street lamp in this area. The usual tag for this is highway=street_lamp"

Hi!
I've corrected the tags for some pedestrian crossings here:
changeset/64034265
changeset/64034307
I can't try it because I have no Iphone. Does Go Map! suggest to use highway=crossing on ways?
This would be an error in the app and you should report it.

Hi!
Please check way/548629361
You added highway=traffic_signals to a building, as well as a name. Was any of this intended?

Hi! Why do you use the unusual tag highway=yes here?
way/639137994
way/639137995
I think unclassified or track are reasonable. If you are not sure, please use highway=road, not highway=yes

I agree with mueschel. My understanding is that the routing apps should show something like "enter roundabout ... leave roundabout at 2nd exit". The apps don't need to know where the traffic signs are. I think when you map a traffic sign it shows that you visited the place, thus it somehow adds credibility to your edits.

Moin!
Schau bitte noch mal auf way/638812209
Das sieht für mich nicht so aus wie die Bilder zu highway=bus_guideway in wiki:
highway=bus_guideway
Dort wird für normale Nur-Bus-Straßen
highway=service, access=no, bus=designated
vorgeschlagen.

Regarding the position of the pipeline:
I assume that it always parallels the service road that is visible in the places that I mentioned?

I am not a local, so I won't contribute to the discussion. What I see now after your recent changes looks good to me.

Ah, OK, your cs comment said Esri World Imagery (Clarity) Beta, but you are right, Esri World Imagery shows the buildings with the current shapes.

OK, I give up. You want to establish a new tag here and up to now it seems that I am the only one who doesn't like it. Since you added access=no at least it should not any harm.

Ah, yes, it is OK to use junction=roundabout on a node for small roundabouts which are not mini-roundabouts.

My understanding of the wiki
junction=roundabout
is that the tag junction=roundabout should not be used on nodes at all.
Which routing apps do you mean?

Hi!
Please check typo highway=untrack
on way/593192830
I guess you wanted to change it from unclassified to track, but the northern end
is still a bridge with highway=tertiary which is connected to a highway=unclassified.
Please note that highway=track implies that the road is "mostly agricultural use".
In case of way/593192830 I would opt for unclassified, as well as for the bridge.

I also wonder why the shape of this building is so large:
way/638831279
All sat images show a much smaller building.
Same problem here:
way/638831350
Maybe sat images are out-aged?

Hi!
Why did you change highway=road to the unusual highway=unspecified?
It looks like a highway=residential to me, as well as way/92622380, which is tagged highway=unclassified (!?)

Hi!
Please don't invent new _link road types.
I think the correct tag here would be highway=residential .
See also osm.wiki/Highway_link

Hi!
I've fixed a few more issues at Isingiro Roundabout, see changeset/63968920
I think you should not use junction=roundabout on a node like here:
node/5612340183

Hi! You added highway=crossing to a boundary here, I've reverted this:changeset/63968626
You probably wanted to add this to a node instead?

Moin! Ich habe hier ein highway=crossing an einem landuse=residential entfernt:
changeset/63968545
Anscheinend hast Du in Go Map! das falsche Object ausgewählt?

Hi and welcome to OSM!
You created a lot of ways with the tag highway=crossing here. This tag should only be used on nodes, the ways are typically mapped with highway=footway + footway=crossing. See also highway=crossing
Hope this helps?