Won't repairable phones be bulkier? I would think its hard to be able to have as compact / integrated / low-toleranced of a design if you make more exposed screws, clips and replaceable seals etc.
Also, "right to repair" doesn't mean manufacturers have to change their product designs in any way. iPhones today aren't hard to repair because they're thin, they're hard to repair because Apple ships DRM that checks the serial numbers of all the parts, so that it will refuse to work if you try to replace something.
Surface Pro X and Galaxy Buds are great examples that show just compactness and relative repairability can coexist.