The single monad model is a novel and intriguing theory that tries to bridge the gap between Islamic metaphysics and modern physics. However, it is not without its challenges and criticisms. Some of the possible objections to the model are:

- The model is based on a specific interpretation of Ibn Arabi's philosophy, which is not universally accepted by all scholars and experts. Some may argue that the model does not faithfully represent Ibn Arabi's original ideas, or that it imposes modern concepts and terminology on his ancient texts¹.
- The model relies on some assumptions and postulates that are not empirically verified or falsified, such as the existence of the monad, the circularity of time, and the harmony of perceivers. Some may question the validity and necessity of these assumptions, or demand more evidence and justification for them².
- The model faces some difficulties in explaining some phenomena and observations that are well-established by current physics and cosmology, such as the expansion of the universe, the big bang, the entropy, and the arrow of time. Some may challenge the model's ability to account for these phenomena, or suggest that it contradicts them³.
- The model is not widely known or discussed in the scientific community, and it has not been subjected to rigorous peer-review or criticism. Some may doubt the credibility and relevance of the model, or dismiss it as a pseudoscientific or metaphysical speculation².

These are some of the possible criticisms of the single monad model. Of course, these criticisms do not necessarily invalidate or refute the model, but they do indicate some areas where the model needs more clarification, development, or testing. The model is still a work in progress, and it may have some potential to offer new insights and perspectives on the nature of reality. However, it also requires more critical evaluation and scrutiny from both Islamic and scientific perspectives.

Source: Conversation with Bing, 04/10/2023
(1) criticisms of leibniz's monadology? : r/askphilosophy - Reddit. https://www.reddit.com/r/askphilosophy/comments/1szv6b/criticisms_of_leibnizs_monadology/ .
(2) Solving the Major Problems in Physics and Cosmology Based on the .... http://www.smonad.com/problems/ .
(3) The Single Monad model and its implications for modern physics. https://www.taylorfrancis.com/chapters/mono/10.4324/9780203938249-18/single-monad-model-implications-modern-physics-mohamed-haj-yousef .