As of right now, Netflix has not renewed or cancelled Somebody Feed Phil for a fifth season. But looking at the show's continued success, it's reasonable to believe that a renewal is on the horizon. As a travel food show, Somebody Feed Phil is largely hindered by COVID-19. Before the pandemic, the show was able to travel to places like Seoul, Marrakesh, and Venice with ease, but now that's quite difficult, so Netflix is likely questioning how to continue the series in the world we live in right now.
Rosenthal seems hopeful about the show's future. In an interview with The Wrap, Rosenthal spoke about season 5 plans, joking that "I think the show might have to now be called, 'Somebody Feed Phil al Fresco,' to take the safety into consideration. But you can still explore many different cultures and meet people and stay safe at the same time." In another conversation promoting the release of season 4, Rosenthal explicitly stated that he thinks the show will return, but that "there will be a slow evolution back" (via Houston Chronicle).
With all of this in mind, a possible release date for a fifth season is probably sometime in mid-2022, but it's all dependent on Netflix's plan and the state of safety around the world. Thankfully, Netflix has already begun restarting various productions, so hopefully Somebody Feed Phil is on their agenda.
