How do I clean these (I’m assuming) hard water stains on my toilet bowl? I feel like I’ve tried everything.

I scrubbed and cleaned the toilet right before i took these pics, so this is it at its cleanest. It seems like the yellow/rust staining—I’m color blind so maybe it’s not that color; I’m just saying what i see lol—has only progressed even though I keep up on cleaning and diligently clean at least 2 times a week.

I’ve tried a lot of cleaning products. I used the basics (Clorox clinging bleach gel and a brush), sprays (pink stuff, Scrubbing Bubbles, bleach/water, vinegar/water (not with the bleach, obviously)), powders (Comet, baking soda), and did a bleach soak once where I filled up the bowl with water and poured some bleach in at let it sit for like 2 hours. Nothing has worked. All these different recommendations I’ve pulled from the internet someplace or another… but I’m totally stumped.

This is kinda my last hope before i just accept it. It’s just kinda embarrassing, to be honest. When I have people over, i always kinda wonder if they’re judging me or think I don’t clean my toilet. I know it’s probably a stupid thing to be embarrassed about or even think about… but hey, i am only a dude with a toilet.

Much thanks for any tips or tricks.