@Pe1ebc My understanding is that .bode can only return one transfer function. The traditional way to obtain a Bode plot using the .meas NAME fra FREQ INPUT OUTPUT syntax allows multiple transfer functions to be analyzed. For .bode to have multiple transfer functions, it would be necessary for Mike to add an additional feature.
There are at least two FRA projects in this forum. @physicboy and I both have our versions of FRA. I just uploaded a variant with 2 transfer functions at the following link.
QSPICE Forum Schematic Capture “A Frequency Response Analyzer (FRA) in QSPICE” - QSPICE - Qorvo Tech Forum
I recall that @physicboy also has a version with multiple channels… (@physicboy, did you upload that on your GitHub?)