I’m not all to familiar with the iso layouts. Non of my model Ms have wire stabilizer for any key other than spacebar.
Maybe your enter key is using a wire stabilizer and the wire is missing. Check the bottom of your enter key and see which type of stabilization it is using (https://geekhack.org/index.php?action=dlattach;topic=55003.0;attach=56349;image). If it is using the wire and it’s missing or damaged, you can probably take the wire from the plus key and use it for enter
It’s still on AliExpress - https://a.aliexpress.com/_mr336WK
Well it looks like they only have transparent purple left