iphone random restarts

hello there ,

i have an iphone 8+ , a few months back i started to restart randomly, so i contacted the support team and they told me that the battery is not in a good shape and that's the reason , so i had it replaced (currently in the 3 months warranty period) , but after replacing it the problem just got worse i am facing more restarts through the day , i tried to force restart it , updating, restoring through itunes , but nothing helped so i searched online and managed to get these panic log file

what does that mean !? was it the battery or was i fooled into replacing it - not cheaply- !?

can i ask for an iphone replacement according to the warranty terms !?

thanks