You should know that most printers have coded tracking dots that prints invisible Machine Identification Codes with time, date and printer serial number on paper, with who knows what else to track what you print.
I always assumed only high-resolution "modern" printers do that, but it turns out the technology
was developed in the mid-1980s. I wouldn't worry about yellow dots on an old black and white laser printer, but more imporantly: the tracking is meant to track a printout to a certain printer. Printed seed phrases aren't meant to be shared, and even if someone would get their hands on it, they wouldn't be interested to know which printer you used. They would just take your money.
Long time I ago I remember printing some cd covers on my old printer and they all faded a lot, this could be because of cheap ink paint, but you get my point.
I prefer toner over ink.