Hi @KhaledJaber9762
If your intention is to have connectivity between PCs using IPv6, then you must keep in mind that for this all your topology must have IPv6 configured, in addition to IPv4, either statically or dynamically.
But, routers do not automatically convert IP from IPv4 to IPv6.
If your intention is to ping directly connected routers using IPv6, then I recommend assigning an IPv6 manually to each router, following the same principles used for IPv4.
There are many useful guides on the internet and many videos that you could consult to exercise your knowledge.
If you are studying CCNA, I recommend consulting your instructor, as the personal guide is very useful.
Regards