when speaking of bitcoin as a technology that is new and different from anything else we knew, usually people in countries that are more technologically advanced (that is the developed countries) are more happy about adopting such new technologies. in this case we are talking about adopting bitcoin as a currency and a new technology and benefit from it.
but others, like in underdeveloped countries are usually not so eager to adopt new technologies because they are behind in everything else so in case of bitcoin they may also remain behind that means they won't adopt bitcoin as much as others and if they do they would do it as an investment instead.

If the government concern with their people, they will use many ways to grow their country and they will help their people to get a better life. The undeveloped countries will search for a new solution, and if they can find benefits from cryptocurrency, especially from bitcoin, they will try to tell their people to use bitcoin.

But yes, there will people who will hindrance the way of adoption because they want to rule the country without wanting to grow their country. That people usually have the power to control the country, and they will use every way to make sure they will continue their rule.

Good observation!
a) being unbanked and b) having a currency subject to depreciation, are two major reasons to use cryptos.
(I'm not sure about bitcoin being the best remedy for that, but that's another story.)

Statistics show that cryptos adoption is indeed mostly widespread in developed countries

https://www.statista.com/chart/18345/crypto-currency-adoption/

Bitcoin like other products of emerging technology will bring real positive development to the underdeveloped countries. One of such instance of positive will be helping to bank the unbanked which is common in the underdeveloped nations. With bitcoin citizens of such countries can easily make financial transaction without boundary restrictions.

Bitcoin has been a big blessing to the underdeveloped and developing countries and will continually be a big breakthrough. Currently, for individuals who already invested in bitcoin in such countries are happy today about their financial liberation and their government know about this but won't publicly acknowledge the fact because of their corrupt dealings.

If the government of the underdeveloped nations could adopt bitcoin and blockchain, it will change their system forever by first blocking leakage and bringing discipline to public and private services and creating a new level of dimensional wealth. Let's hope they think about this innovation and act fast. Although Ugandan President is crypto friendly but the president will have to step outside for things to be well arranged.

I join Your words and want to add that for underdeveloped countries (as a rule, the cost of electricity is not great) is very important occupation is mining.This activity can bring significant income.

There are places in the world where there is no internet connection or mobile towers and you can empower them by building infrastructure and then spreading the word about bitcoin and teaching them about the benefits and then open them to the world so that they can have interactions with the outside world and learn things as well as open to international trading and that is how you reduce poverty and if that happens then bitcoin is a benefit for all the under developed countries.