I am requesting that MetaMask to make it possible to connect a hardware wallet through the mobile app not just the desktop version, Some people don’t have the luxury of being able to own a desktop or they either don’t have the space for it, adding this extension I believe will bring even more security to the mobile version of your service and the growing population of Bluetooth hardware wallets.
Hey @Exoqus, welcome to the MetaMask community! 
This is in the works by team and will be released sometime this year 
You can keep up to date with it in this topic here:
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Someone in the community proposed to support bluetooth connectivity, got support from a lot of community members, if bluetooth is implemented, this will solve your problem 
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