Zoro trained under the Swordsman he aims to defeat, so for Zoro to know that he is ready to fight Mihawk again, he wants to defeat stronger opponents & so far only 2 Characters grabbed his attention & they are Fujitora & Kaido
IMO Zoro came out of TS in his Full Power second only to Admirals & Yonko
Hody was a joke to him, Supernova didn't interest him, Pica (The strongest he fought), he considered him very inferior,
He completely ignored Calamities & consider them unworthy of his time & even Denjiro who seem like Strongest Scabbard, Zoro didn't seem excited to meet him ... etc
From Zoro's Perspective, only an Admiral & a Yonko got his interest, Zoro was Top 10 hundreds of chapters ago lol