its probably not bricked, its more like it that you a a version of luma that is too old for firmware 11.3.
Check if you can get into hourglass9 or luma settings with start+power and select+ power.
if that is the case, then download latest luma version from
https://github.com/AuroraWright/Luma3DS/releases and place the arm9loaderhax.bin from the zip in the root fo your sd