In love is being stupid together, does Clark worry about what Lex is teaching Kon? Lex is teaching that kid it’s ok to ignore people and he can take whatever he wants and Lex will let him and replace it. He’s going to be an awful teen if Lex keeps that up.
Currently, naw, because he is high on baby-brain and also Konnox is only like six weeks/four "years" old, so “don’t let the six week/four year-old draw with Lex’s office supplies and fancy pens”/“don’t let the six week/four year-old steal Lex’s breakfast” is probably not really a concern that would occur to Clark anyway. Ma Kent has installed "food is a love language" in this man from the ground up, and I doubt she and Jonathan were ever the type of parents to complain about their miracle space baby having nondestructive little-kid hobbies.
Like if Lex was drowning the kid in tablet-time and excessively expensive gifts while ignoring/neglecting him emotionally or if Konnox was acting out by destroying things and then expecting/demanding immediate replacements for them and acting out worse if he didn’t get said replacements, those are things that would tweak as definite concerns to Clark even past the baby-brain, but from his current perspective Lex has been spending a TON of time bonding with and doting on the baby, and the baby is just a quiet, chill kid who likes to do quiet, chill things but doesn't really have any social skills yet.
( also lbr, translated through Lex-ese, Lex HAS been bonding with/doting on the kiddo, and Clark knows Lex well enough to know that, hah. )
I mean Lex IS going to be doing his damnedest to raise the clonebaby to just Take What He Deserves, which in Lex's opinion is "literally the entire planet if you actually feel like dealing with that nonsense", don't get me wrong, hahaha, but all the things Clark has seen Konnox annex are things that either belong to specifically Lex ( who is one of Konnox's parents and therefore SHOULD be providing things like food and toys and art supplies for Konnox, in Clark's opinion ), or that clearly came out of an office supply closet ( which, you know, traditionally is full of communal property meant to be taken as needed anyway ).
Also baby is a baby; baby can only be expected to have developed so many manners in six weeks, lol.