Only way to mod RX 5600XT i have been successful by modding  same manufacturer bios on it but different series.
Some bios are slower then others for RX 5600XT
On sapphire pulse which was stock bios max hash was 40mh , then used Sapphire pulse BE bios and got the hash up to 43mh/s
Like the timings editing really doe not work, it bricks the bios. It makes me think that we need different tools for editing.