Mathematics is reality, even if not our experienced reality. It is the laws with which the universe is written, as Galileo said. Plus, Penrose says reality is real.
https://arxiv.org/abs/2304.09633
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.101.013418
https://arxiv.org/abs/quant-ph/9905002
https://dl.icdst.org/pdfs/files4/d8a229b3a90c803764004b69cbb457f6.pdf
https://link.springer.com/referenceworkentry/10.1007/978-0-387-30440-3_82