[Python] How to retrieve relations of type `route=bicycle` with OSMNX?

I would like to extract several bike touring routes from OpenStreetMap using the OSMNX package. For example, this bike route has the property type=route and route=bicycle. However since they are Relations and not Ways, I cannot use the functions in the OSMNX Features module:

Is there a different way to extract this data ?

My attempt using the Features module:

import osmnx as ox
ox.__version__ # '1.5.1'

tags = {"route": "bicycle"}
gdfox = ox.features_from_place("Charente-Maritime", tags)
gdfox.shape # (0,0)

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