i had to factoryReset and installed lawnchair from fdroid and then i tried the Lawnchair.14.0.0.Beta on their official site too. On these versions, like you wrote, it’s not possible.
only lawnchair-2-0-2589 from Aurora store (on google play store) has that option 🤷
isn’t there a list of supported devices?
iirc, unless you have a supported phone, you can’t try lineageOS
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