I believe the mission of SPARRSO is (according to Wiki),
"space and remote sensing technology, in the field of Agriculture, Forestry, Fisheries, Geology, Cartography, Water Resources, Land use, Weather, Environment, Geography, Oceanography, Science, Education, science-based Knowledge and other related space research areas. It also perform research activities for developing this technology and its practical application."
In other words, use of foreign satellites for remote sensing, GIS type uses to help agriculture and fishery yields by providing that information to the fishery dept. and Ministry of Agriculture, among others.
They are a remote sensing organization, not a satellite launch regulator or partner, as far as I know.
Since Bangabandhu-1 is a communications satellite - they have no involvement with it since that satellite has no remote sensing feature.
Maybe when we get a remote sensing satellite, our own eye-in-the-sky, then we can involve SPARRSO to parse the results, which is where their skillset lies.