Think of it as a Half recumbent.. recumbents already accept flipping the stem.

FWIW , customers like the stop, flat footed, that the crank forward
low saddle position offers.

some are just not comfortable with Tippy -Toe
or higher-ground to saddle distances readers of this forum
defend as their preferences..

To the OP : consider cruiser pull back bars..

.. consider also as an extreme example, long wheel base over the seat steered recumbents ,,the handle bar turning the front wheel to balance,
at low speeds , sometimes makes it necessary
to let go of the handle bar end, that must swing away from you
quite a ways. as the handle bars become more like a
2 handed tiller lever..