It’s generally only l before m, and b after m. So no l sound in salmon or calm, but there is in solve. Oddly, there’s no l sound in salve. Likewise, there is no trailing b sound in bomb, dumb, or lamb. Of course, it’s important to remember this is English, where the exceptions outnumber the rules, which is expected when you mash three languages together with a sprinkling of the rest of the languages.