Flash

I watch a lot of TV on an iMac (Catalina 10.15.3).  I relaize that Chrome is the recommended browser on Macs, but sometimes I need to use Safari. With Safari the TV login page REQUIRES Adobe Flash player. That Flash app is no longer supported as of the end of 2020. For various reasons I got rid of it.  How do I get past the TV login page in Safari without Flash?

Chrome works just fine (or as well as it can work, which is horrible on a Mac) without Flash (or the pepper player as its known). How is it Chrome doens't need Flash but Safari does?