For a poverty line definition then, as I mentioned, we can observe fewer people being below the poverty line as time goes on, but we're ignoring inflation and buying power. Fewer people being under the $1/day poverty line is great, unless essential purchases have doubled in price.
What we've seen in recent decades has been a mix of inflation and basic resources becoming more assessible/cheaper. So when I say people are getting poorer, I'm saying poverty lines ignore this the access angle unless they adjust for inflation, but then also counter to that some essentials have become more accessible, like access to medicine, education and energy. So whilst buying power may get worse for some, they're 'wealthier' in terms of things that they have increased cost-free/low-cost access to.
There have been attempts to use definitions that do adjust for access but they're a lot more difficult to normalise across countries. Something like the Big Mac Index is a quick and dirty tool but obviously it focusses on a single item in a single category (food) so it can't provide a very detailed picture of access to resources, buying power, and poverty on the whole.
