Overwrite existing Compose key sequences in GNOME

I'm using Arch with GNOME 41.3 (Wayland), and I'm trying to rewrite the existing Compose key sequences. I know that I can define custom sequences in my ~/.XCompose by : ; perhaps a potential workaround might be to remap my Compose key to something other than ``, and then defining my custom sequences that way. But I'm not really sure where to find documentation on this. I would much rather just somehow overwrite the existing sequences. Thanks.