I use a Hexloxs through axle front and rear (they also make front and rear spindles) as well as Hexloxs for the seat post, stem handlebars and saddle clamp. So all I need to do is secure the frame and the rest of the bike is safe. For a lock I use the Abus alarm lock. Expensive but compact, easy to carry, can be cut only with an electric grinder or torch and it makes a 100 plus decibel siren if moved.
https://hexlox.com/