“The key to growth is the introduction of higher dimensions of consciousness into our awareness.” Lao Tzu
The theoretical framework of Superstring Theory posits that the universe exists in ten different dimensions. https://phys.org/news/2014-12-universe-dimensions.html
According to Hinduism there are 64 main dimensions and each dimension is further divided into many sub-dimensions.
The Buddhism in essence focus is one present realtiy, the focus is on here and now. In a simple way it teaches there is only one dimension the present truth and all or everything is connected, obviously it is more more complicated than that statement. Buddha said: “As a net is made up of a series of ties, so everything in this world is connected by a series of ties. If anyone thinks that the mesh of a net is an independent, isolated thing, he is mistaken. It is called a net because it is made up of a series of interconnected meshes, and each mesh has its place and responsibility in relation to the other meshes.”
Christianity has different views on the topic. The extra dimension of Spiritual realm is mystery to many in defining it within oneself or outside. The Bible said “In the beginning God created the heavens and the earth” Genesis 1:1 . From my perspective there is at least 3 dimensions mentioned, one that God is in , then one dimension of heaven and one for earth earth.
Islam is similar to other religious philosophy ( I am not expert on Islam) The concepts of dimensions are many or just one, I would say it is how you interpret or personal beliefs according to one’s perspective.
Finally a Sufi teacher told me there are at least 8 dimensions or worlds but all in the same world or dimension. He explained trying to describe colour to a blind person. I have read much of Rumi work and often he explains the reality what we see is not the actual reality through the use of many wonderful stories or parables.
The humble human for centuries has relied on spiritual doctrine or sages to define the dimensions of reality. Then science through its lens of perception of measuring through the analytical brain of the senses comes to its own conclusions.
The aspect of a person mind will interpret how many dimensions through intuitive, cognitive assessment with core beliefs as the foundation of a person experiences. The psychological models of a child’s mind and old person mind is totally different because of not just core beliefs and experiences but biological underpinnings of perspective.
In conclusion in this brief synopsis of dimensions I encourage you to think of new dimensions when Captain Kirk said on the enterprise “: To explore strange new worlds. To seek out new life and new civilizations. To boldly go where no man one has gone before!