Who can see transaction ID?

I'm curious to know, who exactly has the ability to view a transaction ID in the world of cryptocurrency? Is it only the sender and receiver who are privy to this information, or are there other entities or platforms that can access it as well? And if so, what are the implications of this level of visibility for privacy and security in the blockchain ecosystem? Could you elaborate on the different stakeholders who might have access to transaction IDs and how this might impact the overall transparency and anonymity of transactions?