What is impostant for tidal forces is not the absolute gravity, but the differential gravity across the planet, that is, how different is the gravity at a point on the surface near the sun relative to a point on the other side. Because the Sun is far away, gravity doesnt change much between the two extremes on earth. However, if you compare it with the moon, becaause the sun is much heavier, the resulty will be that the tidal force from the sun is about one third that of the moon.
This is because if two bodies have the same apparent size in the sky, like the moon and the sun, then the mass M of the object will grow as $r^3$ (because $M=4/3\rho\pi R^3$ and $R=\theta r$), so the force actually grows linearly with $r$. Where $r$ is the distance and $R$ is the radius of the object. So if the moon and the sun had the same density, the tidal force would be the same. The density of the moon is about 2.3 times larger than that of the sun, that is why the tidal force is larger by that factor.