Tough to tell exactly in Apex, as there is only an actual latency value shown in the server list. However, the latency warning appears permanently in-game which I believe is only visible above 180ms. (wasn't there on CISP)
I'm also an online gamer and I've seen my pings going through the roof at times, but that was when I was on 20mbs WISP. Since I've connected to fibre on 16 July, I actually haven't played much online again, maybe I need to check out the Battlefield 5 servers tonight.
I'm on a 100/10mbs package and on occasion the servers are extremely slow when I download games digitally from PS store. So what I do then is to pause the download for appr. 5sec and then presume and then it runs well again. Sometimes I need to do this perhaps 3-4 times?
Can I just confirm if you connect via LAN cable? And do you not have anything else running in the background?