In past when I was born like 1990s I notice most animals haven’t evolved in 30yrs. Example cats haven’t gain more muscular body as to be strong to defend themselves from predators like well many animals of coyotes, raccoons, possums, red fox, bobcats, birds of prey, wolves and others
Evolution takes either many generations or strong evolutionary pressures (or both). For your example species, domestic cats, 30 years is only about 30 generations. Most domestic cats (as opposed to feral ones) are bred by humans, and are selected for attributes - call them collectively "tameness" - that make them good house pets. These attributes are not those which would help as defenses against predators.
Now if you looked at populations of feral cats, you might find them evolving such traits, since they'd be under strong selection pressure. (Though stealth & avoidance behaviors would seem to be more likely than size & strength.)
Conversely, wild animals can be "evolved" under human selection in a fairly short time, as for instance in the Russian fox domestication experiment: https://en.wikipedia.org/wiki/Domesticated_red_fox You could also consider the evolution of the coywolf in eastern North America: https://www.csmonitor.com/Science/2015/1108/How-did-a-canine-hybrid-coywolf-emerge-in-front-of-our-eyes
Likewise, if you go to organisms with shorter generation times, examples of evolution, such as antibiotic resistance in bacteria, are quite frequent. Indeed, if you have been paying any attention at all to recent events, you might have noticed that a variety of coronavirus has recently evolved the ability to infect humans.
You are witness to the COVID-19 epidemic, an example of evolution.
True, there are not weird bipedal cats walking around. Actually Youtube shows quite a few, but you get my meaning.
But there is a new virus ravaging the world. Where did it come from? It came from predecessors that were not so pathogenic for humans, got a purchase in humans, and a new strain evolved.
Evidence for natural evolution
The scientists found that the RBD portion of the SARS-CoV-2 spike proteins had evolved to effectively target a molecular feature on the outside of human cells called ACE2, a receptor involved in regulating blood pressure. The SARS-CoV-2 spike protein was so effective at binding the human cells, in fact, that the scientists concluded it was the result of natural selection and not the product of genetic engineering.
This evidence for natural evolution was supported by data on SARS-CoV-2's backbone -- its overall molecular structure. If someone were seeking to engineer a new coronavirus as a pathogen, they would have constructed it from the backbone of a virus known to cause illness. But the scientists found that the SARS-CoV-2 backbone differed substantially from those of already known coronaviruses and mostly resembled related viruses found in bats and pangolins.
A rare thing - the evolution of a new and dangerous life form in your time on earth!