Regarding “digital remake of some older camera”: there are a lot of APS-C and MFT cameras that resemble older cameras, like the Nikon Zfc, which will have smaller lenses because of the smaller sensors. A good example is Sonys 20mm F2.8 which is super small but only APS-C compatible.
I had the Sony Zeiss 35mm f2.8 and for FF I think it was pretty compact. You could also look into manual lenses, for example the 50mm f2 from TTArtisan is very small and affordable.