Hello,
There is already a discussion thread talking about this that was closed on May 21 of this year, but so far, since the 3.x update, this bug has yet to be fixed. Before version 3.0 was released back in May 2021, I used to be able to load presets and use them, but since then, I have not been able to use the distortion presets unless I downgraded Audacity from 3.x to 2.4, which was released in May 2020. Please resolve this bug as soon as possible, so that users who are using Audacity 3.0 and higher can use the distortion presets given by default.