High Sec Asteroid belts are so small that they not an Orca load. That mean that a Orca must mine multiple Asteroid belts to get a full load. Since the Asteroid are so small it mines more travel flight time for the drones.
The last time I solo mined in an Orca it took 3.5 hours to mine a full load. That would have been in 2018/2019. That is a max skill Orca pilot , tech II mining drones, 2x tech II mining drone rigs and 1 tech I mining drone rig.
If I put a Coveter alt with the Orca boosting9max boosting skill, max Orca skills, mining foremen implant). I can fill an Orca in about 70-75. If I jump that alt up to a Hulk with the Orca boosting, 52 minutes to fill an Orca. You have to remember that Asteroid belts are so small that those times are wrong now.
An Orca solo mining now is about 5 hours solo and with an alt it is about 1.5 hours. These are normal asteroid belt times in High Sec.
The Orca is a garbage miner but has a nice tank and a great booster. I have already quit playing Eve because of @CCP_Rattati ECO changes. If they nerf mining even more I will never come back to Eve.