When how I choose to observe a photon at a particular time and place can (1) instantaneously affect a photon a billion light years away and (2) retroactively changes the history of that photon (delayed choice quantum eraser), and when we have searched far, wide and deep and have not found any “matter,” we have comprehensive, conclusive evidence that we do not live in an objective, external, material world.
At some point, if your views are guided by reason and evidence, you will have to accept that whatever “experience” is, it is not caused by an objective, external, material world.