This is somewhat off topic, but a question to Americans: Why do none of you seem to pronounce the "l" in soldering? Every US video seems to say "soddering"

I always thought of it as analogous to the silent Ls in calf, half, caulk, and Polk.

Don't know - we also don't pronounce plenty of other letters too. Plumbing is plumming not plum-bing.

Also apparently the word solder comes from Middle English 'soudure' which doesn't even have an L in it.