I'm looking for something where the mc (preferably male) is forced/pressured to marry someone but they both oppose or the mc (Again preferably male) is pressured/encourged to have children or date someone but doesn't want to.[m]

I've never read this one, but I came across it as a recommendation that someone one.
Tsuki no Shippo. It sounds like it fits your criteria 😀 !

maybe takane to hana or hapi mari

Kyou kara Ma no Tsuku Jiyuugyou! has the (male) MC get accidentally engaged to the secondary protagonist (also male) and neither of them want to get married.