Underground Cables vs Inductance

I think you have that reversed. Maybe you mean capacitive reactance.

I do not think you are generally correct - the inductance of 3 conductors in equilateral spacing depends on the ratio [D - r]/ r = [D/r] - 1 where D is the spacing between centres and r is conductor diameter. Since D/r is so much less in underground cables, which usually have solid insulation rather than air in overhead, they are going to have less inductance.

If you wrote that underground cable had much higher capacitance than overhead, this would certainly be true - because the geometric effect and the high permittivity of solid insulation compared to air considerably increases capacitance.

You need to clarify the kinds of cable/line at which you are looking. Temperature of overhead bare cable at rating is less than buried and ambient/sun have more effect - buried cables may have water cooling which increases rating for size, decreasing inductance/rating.