Telegram’s backend is proprietary software and they (very similarly to Discord for example) can just decide to read your chats whenever they want. It’s even worse then WhatsApp in this sense (at least as long as you trust Facebook that they actually encrypt your chats, again, there is no way to know if it’s proprietary software).

Just stop using the spyware ones?

I know you probably don’t wanna hear it, but just use one of the Bing wrappers like DuckDuckGo. There is no reason to use Bing in 2023 anyways.

I wouldn’t accuse him of doing it for views (he gets enough of those), but he is just not much of an expert when it comes to software in my opinion.