US Citizen living abroad getting Pro-approval for a mortgage

I am a US investor who currently works and lives in Europe.  I was surprised after calling a few of my favorite conventional mortgage providers that they're no longer providing mortgages for anyone whose income is generated outside the US. This wasn't the case last year and I am not sure what changed exactly.  Any recommendations on mortgage providers nationwide that deal with foreign investors?  I am a US Citizen so I am not technically a foreign investor but my income is mostly generated outside the US.