I was using this for myself and thought it would be useful for other people if it was on a site. What it does is it takes any word you give it, then generates a bunch of typos based off spelling, keyboard placement, etc. Then turns those into domain names and checks if they're available and displays it. https://domaintypos.co/
I've just give it a try. It works but it seems not clear and hard to check and find extension. I think you should re-order by extensions (or give a filter on each)
You change what domains you want to check for by clicking the 'settings' icon. If you're saying how they're displayed in the table is awkward, I agree... would like to change it in the future or give more user options. You can search by clicking the above the results, can't filter though.
I just tried and it does NOT work. All I get is a BLANK white page. Just for kicks I tried validating the page (https://validator.w3.org/nu/?doc=https://domaintypos.co/&showsource=yes). No surprise there - does not validate. However, with ONLY one error, this is the most valid page I have seen in years. I doubt that the error is the problem, though. All that I know for sure is the page does not work.