STIX Two Math 2.13 b171 is bundled as an unmodified OpenType font.

Copyright 2001-2021 The STIX Fonts Project Authors
(https://github.com/stipub/stixfonts), with Reserved Font Name "TM Math".
STIX Fonts is a trademark of The Institute of Electrical and Electronics Engineers, Inc.

Source: https://github.com/stipub/stixfonts/releases/tag/v2.13b171
Font: static_otf/STIXTwoMath-Regular.otf in zipfiles/static_otf.zip
License: SIL Open Font License, Version 1.1, preserved in STIXTwo-LICENSE.txt.
Upstream documentation is preserved in STIXTwo-README.txt.
