Anyone answering “no” to this is wrong. A mortgage payment includes insurance, various property taxes, principle, interest, and sometimes other items such as mortgage insurance.
Principle and interest are fixed for most people. Mortgage insurance, as an example, is fixed. Everything else is variable.
The vast majority of buyers will see huge changes (increases) to their property taxes and insurance over the lifetime of a mortgage.
There’s also opportunity cost from all the upfront and ongoing capital, and homeowners practically never include that in their monthly costs estimates. Opportunity cost grows over time, too. Not just from compounding growth, but from maintenance and repairs that you otherwise wouldn’t make.
TLDR owning a home isn’t a fixed cost, and it’s usually way more expensive and variable than people are admitting or calculating.