You didn't give the start dates of investment for these. Dhaka metro for example has been going on for how long now?
Anyway assuming average timeframe of 2015 - 2023 for this 50 billion total you are talking about. Thats about 6 billion a year. That makes less than 10% of yearly GCF in Bangladesh.....given Bangladesh GCF is around 30% of GDP in USD nominal terms.
These loans all have to have high transfer efficiencies to not create NPA bubbles, something that seems to be already unfortunately starting in BD even in simpler sectors:
https://defence.pk/threads/awami-go...bangladesh-economy.38530/page-26#post-8613289
So it is stuff I am not going to judge any long term analysis on especially given how low Bangladesh consumption and investment is per person (roughly 10 - 15 years behind India) and the bad corruption, bureaucratic hurdles and weak sustained climate (esp for foreign FDI) that Bangladesh suffers from.
We will have to wait and see. I mean what is Bangladesh stock market total capitalization anyway? That will give an idea of the domestic strength of equity resource available from private sector that will be crucial in making govt based/ coordinated investment work in the long run.
You need to understand that getting a project started in the first place is a lot harder than making it larger later on. The Dhaka metro is due to have 3 lines when complete and we can expect to this to be easily complete by say around 2025.
Matarbari is also due to end up with many more power plants and so by say 2030, do not be surprised if the total power generation is several times more than the initial 1.2GW.