Here’s the headphone output from the Befaco OutV3:
They use an NE5532 which apparently can source more current than TL07x.
From the Erica Synths DIY Output:
Uses a headphone driver chip, LM4808, which however is available only in SMD packages.
Barton Stereo Outs:
This does use a TL0x. I have this board but haven’t built it yet so can’t comment on how it works.
YuSynth:
TL072 and then BC327, BC337 transistors.
MusicFromOuterSpace:
LM386 audio amplifier.
Seems there are as many approaches as there are designers…