I too have an iPad sixth generation and works well except when it slows down to a crawl especially in Safari and often becomes unresponsive. I’ve tried restarting and erasing caches but nothing changes. Have you experienced that kind of slowness?
I haven’t run into that situation, but I rarely use Safari for an extended time on my iPad. Typically, I’ll only visit a few sites in a particular session. I’ll come back here if I notice anything the next time I use it more extensively.