I sent an online support request pointing out the problem (as though they're not aware) and politely asking when it would be fixed. Assuming the reply window for this thread is still open by then, I'll post any response here.
Leo, Jun 22, 2020, 9:55 AM UTC: Hello,
Thank you for reaching out. Please be informed that we've already discontinued RSS Feed on Reuters.com. If you require the service, we suggest that you contact our Sales Team on the link provided below:
https://agency.reuters.com/en/contact-us.html
Kind regards,
The Reuters.com Team
I wouldn't bet money on it coming back, but if this was an intentional move I might have expected them to replace the page with "Sorry, no more RSS, try our app!" or something. They are also still linking to the feeds at the bottom of many pages, like this one: https://www.reuters.com/tools/mobile/us