I've used a US-QWERTY keyboard layout my entire life. I've seen other layouts that do things like reduce the size of the enter/backspace keys, move the pipe operator (|) and can't wrap my head around how I would code on those.
What are your experiences? Are there any layouts that you prefer for coding over US English? Are there any symbols that you have a hard time reaching ($ for example)?
It depends on what you're used to and the programming languages you use. I learned typing on a German QWERTZ keyboard and while that works for languages like Python and Haskell, which are indentation-based, but for languages which use braces like Java, C, Rust, or similar, it can be annoying to have to use altgr+7 or altgr+0 for { and }. Thus I switched to a US ANSI layout, which was nicer for those specific characters, but caused problems when typing local characters like öäüß. After switching to Linux I set up a compose key, letting me press compose + a + " for ä for example, and while that's a decent patch, that still breaks the typing flow. So now I'm in my ergo keyboard phase and trying to get my own personal layout going, which meets my own needs for needed characters, based on a colemak-dh design.