iMac 21" Mid2010 - Bluetooth not working

Hello Everybody,
I upgraded an old but gold iMac 21" to Sonoma this week. Everything went well. I had to adjust the contrast level but the rest is super fast and responsive (running on an SSD already). The only thing that does not work, is bluetooth. WLAN is not an issue. But magic mouse and keyboard can not be connected but are mandatory in this legacy setup. I heard from other, that they had similar problems with other devices and I wanted to check if there is a common way to make bluetooth work?

submitted by /u/gruberhans42069
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