I'm working on a fantasy story set in a slightly modified version of the Trappist-1 system (all orbits are perfectly resonant rather than only nearly so), and I am trying to get as good of an understanding of the various phenomena that might occur in that system which would affect an alien civilization on the potentially habitable worlds of said system. One of the things that has crossed my mind is the potential tidal affects the nearest planets might have on their parent star, Trappist-1, and how that might affect stellar brightness. My basic idea is that the tidal forces, particularly of the innermost planet, might cause the hotter, lighter, more luminous material to rise into the photosphere leading to those planets experiencing slightly more sunlight then other regions 90 degrees or so from their current position. All of the planets will probably do this to some extent, but only the 2 or 3 innermost to any notable extent. This would also mean that the outer planets would experience unusually bright days when they transit with one of the inner planets (or are opposite to them?), which s very good for worldbuilding if these bright days are notably warmer or brighter as they could have cultural significance on the outer worlds.
My basic question is whether or not this might actually occur in the given real system or a slightly modified form of it. I am thinking it might be possible due to the significantly high mass of each of the seven worlds, the fact that the star is relatively low mass, and how close some of the planets orbit. Is this actually possible?