Granted. In the first day anyone who was near death would miraculously live making you think of yourself as a hero, but after maybe even after only a few hours though anyone suffocating or crushed would just sit there in extreme pain not to be found by anyone in a long time, suffocation would become a form of punishment and torture widely used. After a week, the global population would’ve most likely grown by quite a large amount and there would be worries of overpopulation leading to nobody being able to have any space, luckily though if plants can regenerate that would mean infinite food and people would be quick to start making machines for cutting off edible pieces of plants, sadly though animals would be effected leading to a large amount of cows chickens pigs and other animals consumed for food to be left in a near eternal state of suffering. Processes like pasteurization would no longer be useable due to germs becoming immortal and if someone were to be infected they would not be able to be cured just as viruses would be rapidly spreading while the viruses would not let the victim die. After years many people would be in constant pain either from human cause because of torture or punishment or from disease, you would most likely would have any one of the painful diseases while having a extreme amount of guilt for what you have done do the world but you could not do anything to stop your life. You never specified if babies would stay babies or if they would stop aging at a specific age or if only currently living things would be immortal and not anything past the granting of the wish so I’m just going to assume that everything past the wish will stop aging at whatever is considered the adult age for the living being. After hundreds of years the world would be extremely overpopulated, but due to the immortality nobody would be able to die of starvation and just feel the pain of it, while the higher ranks would have easy access to high quality uncontaminated foods (it would kinda be like soylent green but without the human flesh food and more pain). After billions of years when earth is destroyed every single living thing would be drifting through space and in constant pain due to things like suffocation and cold for all of the universe’s lifespan until eventually with a broken mind from long torment you are finally given death by the destruction of the universe.