Looking at the WN, the MC doesn't have any intercourse until chapter 42 (a couple of them in short succession). As of manga chapter 7 look to be around WN chapter 16 atm. So quite a bit to go until anything but heavy petting. At current pace something like chapter 20+ before anything like that, if they choose to cover it since it's in the interlude chapters (I don't see a reason to skip it, but you never know). The first main story intercourse is chapter 57, which is about 43 chapters in if you exclude the interlude chapters.
You can take a look for yourself
https://novel18.syosetu.com/n3640eg/ if you want. The triangles after chapter titles denote things up to heavy petting and stars denote sex.