It's pretty common, but not as common as calarts spergs make it out to be. Some CN shows like Mao Mao and OK K.O. make a point to avoid it or parody it.>letter-shaped noses
That's partially true, because noses in modern cartoons come in all colors, shapes and sizes.
There are letter-shaped noses, geometric shapes (rectangular noses in Twelve Forever, triangular default nose shape of OK K.O.characters),small noses, big noses, button noses, straight noses, Roman noses (Dakota, Elliot and Amanda from Milo Murphy's Law, Connie, Sumo, Soos, Noah), pointy noses (Pearl, Tom Lucitor, Professor Venomous), pig snouts (Clarence, Snotlout, Beth, StarFan13), caricature noses, Squidward-style ballsack noses (Grunkle Stan, crazy old men in various cartoons), Picasso noses (Flint Lockwood in tv cartoon), anime noses, animal noses, weird Deviantart curved weeb noses (Mighty Magiswords), realistic nose-like noses, noseless AT and Big City Greens designs, noses varying by race, age and sex of characters, as well as general art style of the show.
It's a huge difference from anime, which reuses the same tiny dot/comma/L-shaped nose for 95% of characters, typically with little to no in-show variety.>huge bug eyes or tiny beady eyes
Low effort description, this might as well be about anime style.