According to a press release dated 9 February 2021, the Bank of South Sudan has introduced a new 1,000-pound note (B117a) to address the need for a large denomination banknote in the face of hyperinflation.
The Governor signatory appears to be Jamal Wani Abdalla, who held that position for less than two months at the beginning of 2020.
Courtesy of Peter Mosselberger (Bank Note Museum), Massimo Accordi, and Albert.
Where it is printed
No reason to assume it’s printed by anyone other than DLR which printed all other notes for South Sudan.