Hello Jridberg,
Thanks for posting in Apple Support Communities. You've completed some great troubleshooting steps so far.
We'd like to provide you with a few steps to verify if you have enabled Silence Notifications for these two contacts:
1. Go to Settings > Focus, then choose a Focus—for example, Do Not Disturb, Personal, Sleep, or Work.
2. Tap People (or tap Choose People), then do one of the following:
Allow specific people: Tap Allow Notifications From, tap, then select from your contacts.
You can also turn on options to allow calls from certain groups of people and allow repeated calls (two or more calls from the same person within 3 minutes).
Silence specific people: Tap Silence Notifications From, tap then select from your contacts.
You can also turn on Allow Calls From Silenced People.
Click here for more details: Allow or silence notifications for a Focus on iPhone
We hope this helps.
Take care.