Hawking radiation is not about entropy a black hole. It's about entropy of atom nucleus.
T H = ℏ c 3 8 π G M k B {\displaystyle {\displaystyle T_{\mathrm {H} }={\frac {\hbar c^{3}}{8\pi GMk_{\mathrm {B} }}}}}
T H = ρ h ℏ c 3 8 π c 2 β M k B {\displaystyle T_{\mathrm {H} }={\frac {\rho _{h}\hbar c^{3}}{8\pi c^{2}\beta Mk_{\mathrm {B} }}}}
T N = ℏ 2 β c 8 π G m p 2 k B {\displaystyle T_{\mathrm {N} }={\frac {\hbar ^{2}\beta c}{8\pi Gm_{p}^{2}k_{\mathrm {B} }}}}