back during the war arc and battle against kyugga, it was shown that naruto and sasuke cant feel each other across dimensions. That was despite them both having their linked seals and the most chakra they'd ever hold, yet Sasuke teleported to naruto AND sakura across dimensions. or so you'd think.. i think.. NOT. Sasuke didn't teleport to naruto, he teleported to jigen. remember when jigen tracked kawaki through the seal? How did it happen? ACROSS DIMENSIONS. So the precedents set are such:
1. Chakra cannot be felt across dimensions.
and
2. The karma seal can indeed be felt across dimensions.
When Sasuke tracked Jigen's seal to teleport to Naruto and used the presence of Sakura's seal to reach her.
Now ask yourself. If sasuke truly tracked naruto's chakra, what could possibly stop him from freeing naruto from that teapot? Naruto's clearly locked in that teapot even years later. If whole dimensions can't stop sasuke from tracking naruto's chakra, how will a little teapot stop him?
1. Chakra cannot be felt across dimensions.
and
2. The karma seal can indeed be felt across dimensions.
When Sasuke tracked Jigen's seal to teleport to Naruto and used the presence of Sakura's seal to reach her.
Now ask yourself. If sasuke truly tracked naruto's chakra, what could possibly stop him from freeing naruto from that teapot? Naruto's clearly locked in that teapot even years later. If whole dimensions can't stop sasuke from tracking naruto's chakra, how will a little teapot stop him?