The current border closure between Uganda and Rwanda is not affecting tourists crossing both countries. Visitors to Uganda transiting through Kigali can cross the border posts at Cyanika and Katuna as usual. The strain in Uganda-Rwanda relations does not affect tourists. Uganda and Rwanda tour operators are also permitted to cross the border. For guidance on tourist visa required for Uganda and Rwanda, check this article.
"Travel with Bamboo Ecotours and make a difference in rural communities in Uganda"