Probably because you used Bing aerials. Those are not to be used in Norway as they usually have a bad offset. No idea what imagery is available, but in iD the Norway Orthophoto is default and best option.

I just called the ferry operating the route to clarify. The Gudvangen-Kaupanger ferry no longer go via Frønningen or Styvi. It also only operates 1. May - 1. September. From 2024 there is a separate ferry Kaupanger-Frønningen. Styvi is served via the electric passenger ferry between Gudvangen and Flåm.

It is the same service. Fjord1 operates this in summer months. AFAIK the ferry still calls at Frønningen on request. Same with Styvi. It seems as though there is a separate ferry Kaupanger-Frønningen these days. Maybe more appropriate to update the existing route as there are not two separate routes here.

Adding bicycle=designated on a cycleway is pointless tag bloat. It's implied via highway=cycleway Tags like this could get removed via a validator we use here in Norway.

This is a duplicate of the already existing ferry line. The ferry go via Frønningen if needed.

Du har blanda produksjon og effekt. Fennefoss er 9,5 MW. Produksjon har ingen tag i OSM.

Please do not add small road link segments to intersections unless its a slip separated from the rest. Also the same for bus stops and passing places.

No problem. New fuel pumps? Didn't see them in pictures from last year.

Did you add duplicate fuel station on purpose? There are two nodes at this location now.

If you wanted to map the "shed" the chargers are under it would be a building or something. Not tagged as a charging station. If you do it will appear as a duplicate. I really don't see the point in adding such sheds as they have no value for people. If the whole parking lot where you park to charge was covered then it has a nice function.

Please don't add duplicate charging area where there is a node. EV chargers should only be a node as well.

Please don't map this as 3 circuits. 1-2 form one circuit and 3+4 is one. Thus the line only contains 2 circuits. (1+2) and 3, so technically 1.5 circuits as 4 is in the ground. Bipolar HVDCs are considered as a single circuit even though they technically can run at reduced capacity using electrode if one pole is down.

They can happen in some places. For the "ring" around Birmingham it's historical. Several substations used to have 275kV switchgear and as they get upgraded they have to mix. Several substations are still 275kV in Birmingham.
You can see how it all connects on Openinframap

I've fixed all the errors I could find around Birmingham. Please don't modify values unless you know what you're doing. Ask previous person if unsure.

Looking at more of these changes you've removed the proper voltage tags on several lines that has mixed 400kV and 275kV

You messed up some voltages and circuit tag on a few line segments. Line between Coventry and Ratcliffe is a 275kV that shares towers with a couple of 400kV lines.

I've already tagged the segments back to correct value.

Is E16 opened again after the plastering of the riverbank? If so then the access tag also needs updating.

Why did you delete the layer tag in this change? The tunnel is a spiral with several layers.

Please don't split roundabouts for route relations. All the small segments increases the chance of an error down the line if there is a tagging update.

So all I found was a Bergens Tidende article behind a paywall, so I guess its open?