Isn't it an exaggeration to say the ads are unblockable even on apps on phones? The apps generally do have more control on what's shown and what's not. To start

Isn't it an exaggeration to say the ads are unblockable even on apps on phones? The apps generally do have more control on what's shown and what's not. To start, couldn't the ads be filtered and masked from one's router or on a (home) proxy server that one uses? The apps could be written such that they detect if an ad is being replaced with empty content, but I don't think the apps are there yet. On this topic, what are the latest alternatives available for routers/proxy servers that are as good as uBlock Origin (or ABE) on the desktop (sharing the same popular block lists)?