each forked coin can be claimed as soon as they start producing blocks. in other words as soon as miners start finding new blocks on their chain.
but you as an end user have to wait for an easy to use wallet, which is most of the time the full node (fork of bitcoin core) as your only option with 160+GB blockchain size!
essentially, yeah. but be careful not to be blinded by greed. there have been lots of scams and malware being spread in the name of these coins even by their developers which lead to losing the already owned BTC in addition to the forked coin!