Welcome to the community. Can you provide more details, including your Brave and OS version found at brave://version? I am not sure what shortcuts you are talking about or why you are not able to use them. More information (and screenshots if applicable!) would help troubleshoot your problem.
I’m posting a few Brave Help Center articles that may help. I don’t really think some of these are actually related since you indicated problems occurred “when logged into Gmail” but I posted them anyway just in case. I think this might be a Shields settings problem but, again, need more details. Please provide more details.
@licious What shortcuts aren’t working for you? I just went into my Gmail account and they all worked. I’m assuming you still have Keyboard shortcuts enabled in your gmail settings. I was able to use g + i to go to inbox, g + s to go to Starred. Hitting Ctrl + ALT + ,, d to compose in a new tab, etc.
In order for shortcuts like a for Reply All or r to reply, you would have to have the message open. It won’t work directly from the inbox, even if you hit x to select the message.
I guess I’d just say make sure to go to your gmail settings → Keyboard Shortcuts (under General) and make sure it’s enabled.
Also, if you aren’t aware, you can go to Advanced tab within Settings and enable Custom keyboard shortcuts which will create a new tab there where you can custom program your own shortcuts.