SQLite is in the public domain.

All of the deliverable code and documentation in SQLite has been dedicated to
the public domain by the authors. All SQLite code authors have signed
affidavits dedicating their contributions to the public domain. Anyone is
free to copy, modify, publish, use, compile, sell, or distribute the original
SQLite code, either in source code form or as a compiled binary, for any
purpose, commercial or non-commercial, and by any means.

SQLite does not require a license, and no warranty is offered by this
archive. See the upstream copyright page for full detail:

https://www.sqlite.org/copyright.html