No, node runners cannot see or read your sensitive traffic.
Encrypted by default – Almost all websites and apps today use HTTPS, which encrypts data between your device and the destination server. This makes it unreadable to the node operator.
Unencrypted sites – The only theoretical risk is if you visit an older, non-HTTPS site. In that case, some information could be visible, just like on other networks such as Tor.
Technical barrier – Even then, the node operator would need advanced tools and knowledge to capture that traffic.
In short, for modern internet use your traffic is protected by encryption, and node runners cannot see what you are doing online.