Don't look Lidar per se. Look for data in no particular format.
Lidar is method and not format. It results in a DSM or a DTM. DSM, if you're not geographer, is of no use. A DTM is a processed DSM.
DTM can be divided in quality tiers. 30m+/px, old tech, good for flight sims, bad for tanks
12.5m/px, old tech, reasonable but not great
5m/px, good.
2m/px is great, the sweetspot.
Anything below 2m/px will make very big files, 5Gb+ for a 50x50km area.
Also, don't look for a particular area of interest, look for available data, even if that's in another language. That's very common, specially in Europe. European countries cooperate in geography, except, they don't publish their great data in english. In the same place I got all my polish data, the english version was a 404 and the great data required a very hard digging, in polish. I had to translate, for example, all the shapefile data, that included all kinds of trees, forests, roads, buildings, etc.
You can do all that in global mapper, but it's not cheap, it's passion.