As location is everything in a city like Paris, the street right in front of the Gare de Lyon is filled with brasseries serving food and drinks at all hours. Some of them offer Alsatian specialities, others have shellfish etc. They all have macro beers at rather stiff prices.
But a few steps away from this strip is a simple bar, not far above the hall in the wall level. During my evening, there was soccer on several screens, I assume you may find it more quiet at other times.
They have 11 beers on tap, 11 in bottles. Macro lagers, sure, but also some fine Belgian stuff. I had never tried the wheat beer from St Bernardus, and there was even a sour Belgian ale, Borurgogne des Flandres (which could have been more on the sour side). A French Tripel, too, Secret des Moines.
I found a sidewalk table.
I think more bars like this is what’s needed for French beer culture to really take off. Specialized places which you travel across town to seek out is fine for the converted. A hand picked selection of good beers in places where people pop in for a quick glass before going on with their business is more important.