Cannot screen mirror from iPhone to several Samsung TVs

Odd issue, we have an iPhone Pro Max 14 with latest OS (16.3.x), a slightly older iPad (OS 15), and when trying to screen mirror to a Samsung Q60 (also another Samsung TV as well) while Apple devices are connected to same wifi network, it doesn't find/show the TVs available to connect to. It just spins.

Strange thing is, if I use my iPhone 11 Pro running OS 16.2, it immediately sees the TVs, and connects to them using PIN without issue and works. Tried to compare the other Apple devices that are not seeing the TV, but all wifi/Bluetooth and other settings appear to be same or fine/default.

Am now thinking of getting a third party device to hook up to the TV that is compatible with Apple devices to use to mirror/cast to TV with, but I'm not fully certain what is out there that works well with Apple devices to do a simple screen mirroring.

Tim

[Re-Titled by Moderator]