not necessarily,These days you have to use up to date encryption to be PCI compliant. The problem is that PCI compliance is a self reporting standard so any merchant can just say they are compliant and it get's filed away somewhere.
most times theynmakecyou download an app to scan the ENTIRE network, to test compliance
then they send you a report that looks like the dead sea scrolls & a list of "recommendations"
in our old location, (2019) we had 2 neighboring businesses that shared my internet access (we had 29 global ip's so i gave one to each of them. they hooked up their own routers. bob downloaded the pci compliance app and they sent me a list of 6 routers they didn't approve of. fortunately, we were moving to our larger location & bob had to buy. his own internet access