Hey,
Manjaro being my preferred version of Linux, I wanted to bring it to my newest laptop acquisition, an Acer Aspire Nitro 5. Alas - no. None of the suggested ways to install Manjaro seems to work. Like, not even tentatively:
“No partition to install on”, no matter what I try. Sometimes, I get stopped right at the beginning of the installation, sometimes I get to access the partition menu - but in the end, the result is always the same: The installation is unable to proceed.
So, what now? Give up? Try a different distro? Upgrade to Windows 11? 
I have already opened a thread at the official Acer support forum, but looking at the other threads concerning similar topics there, I’m far from hopeful. Should I, a decades-long Linux enthusiast, have picked the one laptop in the world that precisely does not allow Linux, at all?! 
Use latest available firmware