If Bangladesh is growing at a healthy rate, good for it. Let's stay focused on Pakistan. As for comparisons, Bangladesh is behind in many categories, but also ahead in some. In any case, Bangladesh isn't going to surpass Pakistan in per capita GDP (PPP) and poverty levels anytime soon.
Not to mention that much of the gap that they've made up has come from a declining birth rate (fewer people). When Pakistan's fertility rate decreases to around 2.5+ (whenever that occurs), it too will see its per capita GDP figure rise substantially.
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As for Pakistan, its growth rate accelerates a little bit each year. CPEC is alleviating Pakistan's chronic energy crisis, and our growth rate will likely continue to rise each year as a result.