Nheko is my favourite client, it uses QT and is written in C++, its lightweight and works well on my machines with low resources, it also respects my system theme

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I think it kinda looks like a lollipop

I figure that the administrators of your homeserver could see your IP address, I doubt that it would be sent to anyone you are just chatting with.

When your browser connects to a website, it will tell the webserver what type of browser you are using in the HTTP headers. This can be used for serving a special web page for browsers with quirks, or it can be used to block certain browsers.

It may look something like this:

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0

But you can use an extension like this one to spoof your user agent and send out one that corresponds to a chromium browser.