If you don't care to share your phone number with Signal and a third-party company (Signal refuses to state what company it is) that send the text message with the activation code to you. And if you don't care that everything will be saved on servers maintained by Amazon in USA.
Then yes, Signal is the right app for you even in 2026.
But if you do care (ans you should) about your phone number and the location of your data, you should focus on something more privacy like XMPP (Snikket would be the easiest way to setup your own server) and SimpleX.
XMPP (for an example Snikket) uses OMEMO and OMEMO is based on Signal Protocol.