No. History is not synced between devices. Did not use it on windows? - deliniced and after relink you have no history again. It annoys with entering a password. Migration to a new phone backup to s file, somehow copy the file to a new phone, restore - not for normied.
signal has same e2e encryption as WhatsApp and requires your phone number: same level of privacy,much worse user experience, much less features. Not a great option for normies.
darcy