How come Tajikistans gdp pc is only $1300 but its HDI is 0.690. Comparing it to most of the sub saharan countries were gdp pc is often higher than 2k$ but hdi is not even higher than 0.550?

For referense gdp pc of Tajikistan in 2024 is about $1200 and its hdi is 0.690 which is close to Morocco. Comparing to some countries like Senegal where gdp pc is $1700 but hdi is 0.530. So how come such a big differense?