That's not unexpected after a while, as the telco switches prioritisation and bandwidth from 4G cells to 5G cells, as happened with 3G to 4G. But it's too early

That's not unexpected after a while, as the telco switches prioritisation and bandwidth from 4G cells to 5G cells, as happened with 3G to 4G. But it's too early for it to be happening at a noticeable level and might mean your provider has underinvested in capacity. Just a guess though.