Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
mingw64(libflatbuffers-24.3.25.dll)
mingw64-flatbuffers
mingw64-pkgconfig(flatbuffers)

Requires :

mingw64(kernel32.dll)
mingw64(libgcc_s_seh-1.dll)
mingw64(libstdc++-6.dll)
mingw64(msvcrt.dll)
mingw64-crt
mingw64-filesystem >= 95
mingw64-pkg-config
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1

Content of RPM :
/usr/share/licenses/mingw64-flatbuffers
/usr/share/licenses/mingw64-flatbuffers/LICENSE
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/flatc.exe
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/libflatbuffers-24.3.25.dll
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/allocator.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/array.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/base.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/buffer.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/buffer_ref.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/code_generator.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/code_generators.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/default_allocator.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/detached_buffer.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/file_manager.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/flatbuffer_builder.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/flatbuffers.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/flatc.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/flex_flat_util.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/flexbuffers.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/grpc.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/hash.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/idl.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/minireflect.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/pch
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/pch/flatc_pch.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/pch/pch.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/reflection.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/reflection_generated.h
/usr/x86_64-w64-mingw32/sys-root/mingw/include/flatbuffers/registry.h
There is 18 files more in these RPM.