Block from U+11FB0 to U+11FBF. This block was introduced in Unicode version 13.0 (2020). It contains 1 codepoints.
The Wikipedia provides the following information on block Lisu Supplement:
Lisu Supplement is a Unicode block containing supplementary characters of the Fraser alphabet, which is used to write the Lisu language. This is a supplement to the main Lisu block, with currently only a single character used for the Naxi language assigned to it.