Just a general reflection: DSLRs, such as the Mark IV, are a dying breed. Furthermore, if memory serves, the R is cheaper than the Mark IV. On the other hand, as a group, the RF lenses are more expensive (but better) than the EF lenses. Finally, DSLRs may need micro-focus adjustments, which is a hassle. Mirrorless cameras don't have that problem.
Based on what I have read (I have no experience in food photography), a tilt-and-shift lens may be very useful for food photography. For the most flexibility, you may want to consider a 24-105 (the RF version [24-105F4L] is VERY good and not too pricy). Based on the pictures of food that I have seen, the need for 1:1 magnification appears to be minimal, so I would rule out the macro lens.
Do you really need a maximum aperture of 2.8? If you don't, a possible other candidate is the EF 24-70F4L. That lens also has a maximum magnification of around 0.7, should you need it.