A good ol’ curb feeler wont tell you the front obstacle very well, I don’t know of any electronic ones yet but maybe you can adapt the aim of the back-up sensors for that application. ( put on the bottom of front bumper aiming angled down ? Adjust the distance close enough so it won’t be on the whole time just seeing the road suface.) You may have a new and marketable idea there. My search of electronic curb feelers came up completely empty except for the old standard antennea type.
Till then, learn your car’s distances and stop early when in doubt.
By now you certainly know how close is too close or, if not, practice with some non-damaging indicator to get the feel of where you are in relation to a front obstacle. Put a pillow on a marked line in an empty lot and practice . Stop and get out to see how close you are. Repeat till you get the feel of your distances.
–( when my wife lost the vision in her right eye she had to re-learn distances without stereoscopic vision. The way to do that is to use other distance indicators that exist in nature but we rarely think about. In the case of parking ; how big is the car in the next space and how big is your car in relation to that ? stop when your are beside that mental mark )
Another choice I use …back in to every parking spot.
Practice is key again here but if you can back out…you can back in. And backing in makes leaving the parking space so much easier.
Being adept at backing in allows you to get this parking space that is right next to your right side. As you have it there on your right flank, you realize you can’t just turn in…you’re too close. But you CAN back in. just turn a left forward arc then back in with a little right arc
When my dad ( now 84 ) first bought his 07 Focus , I warned him about the low a/c condenser and radiator…he took a look under there…practiced his stopping distance…and has never needed to repair anything under there including the front facia.