add commands dynamically to cog in disnake

Question

This is my cog

class MyCog(commands.Cog):

    def __init__(self, bot):
        self.bot = bot
        cmds = get_commands()
        for command in cmds:
            @commands.command(name=command['name'], description=command['description'], extras=command, case_insensitive=True)
            async def cmd(self, ctx, member:Member):
                embed = await generate_embed(ctx.command.extras['query'])
                await ctx.send(member.mention, embed=embed)
            self.bot.add_command(cmd)

For now the commands are added to the bot and I access them from bot.commands(), but I want them to be added to the cog so I can use cog.get_commands()

Is this possible ? I tried setattr(MyCog, command['name'], cmd) but it doesn't work