EJ20 – A free runner?

Hello, a short question: I read here a good year ago n post, since someone claimed that the EJ20 85KW is a free runner…. so in the case of a timing belt crack the pistons can not beat against the valves…. Is that true? Background is that I bought my impreza from a pensioner a year ago who had all inspections in a Subaru workshop done properly… and according to my manual the timing belt change also belongs to every 4 years or 100 tkm. The problem is that the last one is already about 6 years ago, the car was moved in this time but only 20tkm… If now the danger of engine damage is low, I would delay the timing belt change a little bit, since I have absolutely no time for it in Momtent… What do you think about it? Greetings