[E. Pluribus Unum]

Where do the commercial quantities of ammonia and carbon dioxide come from?

[NorseViking]

Akron, Uralchim, Belaruskaliy, Fosagro - they are responsible for about 30% of the export market in the world and all are Russian and Belarusian companies currently banned from international trade.
Belgium producers are following holding about 12% of the world market but all the figures are for the year 2021.
Also I don’t think the any European producer is going to produce much without Russian gas.

[Rio]

Where do the commercial quantities of ammonia and carbon dioxide come from?

It seems that ammonia (gas) is from direct reaction of nitrogen (distilled from air) and hydrogen (from water electrolysis?). CO2 probably also distilled from air.