Russia decreased the amount of natural gas to Germany via the Nord Stream pipeline by 40%. In addition, Russia also decreased the amount of natural gas to Italy by 15%.

None of this is technical, as the gas compressors Russian is referencing have been being repaired in Canada for quite some time. Thus it is political and Russia is weaponizing its natural gas exports.

These decreases come at the same time that Italian and German heads of state are in Kyiv.

The response has been a sudden 63% increase in natural gas prices in Europe, which are now about 1,200% higher than they were over the past decade.

https://www.barchart.com/futures/quotes/TG*1

This clearly seems to represent a threat to Europe "Do not help Ukraine further or we will cut of your gas supplies entirely and no amount of money will keep your lights on or your homes heated." This could potentially explain the sluggishness with which Germany is moving with regard to supplies arms to Ukraine.