I have XIM 4 and I just got an Apex this week, so I've used both now on my PS5 with the same settings and they feel the same in the game. Are both the Hip and ADS feeling super sensitive or is it only ADS? If it's both I wonder if your G403 is switching to a higher DPI somehow and maybe you should clear its settings in the Logitech software and then set it up again with only one DPI level set 1600. Of course make sure it's not 16,000dpi haha.
If it's only your ADS that's crazy sensitive then maybe this is a glitch. Is your XIM working fine in other games? Maybe try deleting your Cyberpunk profile from the XIM and starting fresh. Don't change any settings on the profile besides assigning the buttons and changing the Hip and ADS sensitivities.