This on allow you to place bricks in a 3D place and so build your virtual Lego project

https://www.mecabricks.com/

This Lego Life runs only on Apple I devices and Android devises

https://www.lego.com/en-gb/life

See Also 10 Best Lego Building Software

https://www.topbestalternatives.com/best-lego-building-software/

This one requires an email address to register to use

https://www.tinkercad.com/#/

See Also **Best CAD (Computer Aided Design) for Kids

https://3dprinterchat.com/2017/01/13-best-cad-programs-for-kids/