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Assist Widget
(midwest.social)
Home Assistant is open source home automation that puts local control and privacy first.
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Home Assistant can be self-installed on ProxMox, Raspberry Pi, or even purchased pre-installed: Home Assistant: Installation
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Hey man. I have no experience with your phone or oxygenos, but I can tell you that's where I found the widget. Also, I replaced my Google assistant with it, so I can long-press the circle and get the HA Assist. (You can map it to the power button, too, I think)
I'm on a Pixel 6a, so my layout may be different than yours:

Hope someone can help more!