It's not Lenovo, but I've been happy with my recent purchase:
HP ProBook 460 16"
https://www.hp.com/us-en/shop/mdp/laptops-and-workstations/hp-probook-465-3074457345617960178--1
My use-case seems similar to yours. It's still pretty thin and light despite the 16" display and only about $1,000 to $1,200 depending on the model you get. Comparable Dells I was looking at were almost twice that price. The graphics aren't officially supported, but work well for me using AutoCAD 2022.
Work: AutoCAD 2022.1.3, Windows 10 Pro v22H2 64-bit, Intel Core i7-8700K, 32GB RAM, Samsung 960 Pro SSD, AMD Radeon Pro WX 5100, 3 Dell Monitors (3840x2160)
Home: AutoCAD 2022.1.3, Windows 10 Pro v22H2 64-bit, Intel Core i7-11700, 64GB RAM, Samsung 980 Pro SSD, NVIDIA Quadro P2200, Dell Monitor (3840x2160)