Early Space Race Era
I agree it can be doable (with a lot of luck) at steam power era but will need a massive effort akin to put the man on moon, maybe even requiring a international task force. Below I will list some challenges were are not pointed in previous answers.
Why not in the age of sail?
Because we never got an age of sail for start. At sec XV we unified some kingdoms and they started a tech race akin to the space race to finally develop oceanic navigation. At sec XVI we founded colonies in the new world and it pushed the navigation development and with the growth of the colonies culminated in the "Age of Sail". Without those elements OP super earth most likely skiped it entirely.
A Fearsome Sea
The size of this Ocean will bring a lot of weather and climate challenges. You can expect winds, tides and currents to be way bigger. Also expects typhoons to be cataclysmic. The tides per se will be a good challenge for the building of ports. The tsunami size weaves can make even fishing impossible in large coastal areas. The sea conditions will be nasty, even in good weather and impossible in bad weather. Navigation will be a really dangerous business. Also the sea conditions will make coastal erosion a thing. I ever wonder if most of coastal will be of massive cliffs. 308
All those factos summed make me wonder coastal cities will be almost entrenched in big natural harbours and important sea trade routes will be exclusively between cities in bays (the only place where is possible to build a big port anyway) and where the route travels along a, most time, very peacefull chunk of the ocean.
Lots of Trains & Planes but no Fleet
The size of the continet this points out railroads will be in demand early ans planes too but navigation will be very limited in all aspects, speacially in tech. This leads to a strange scenario where we will hit industrial age and even space age skipping sail age.
The Dark Side
The Moon is a great target for mankind aspiration, from dawn of time we can see it but we cannot reach it. We dreamed to land here a million times. But what if for millenia we do know Super-Terra has a dark side out of reach? Once scientist proves we can launch a object in orbit and retrieve it the first thing to be flung out will be a camera to take pictures of the uncharted lands. Once the first pictures are retrieved be sure it will trigger a space/exploration/colonization race.
Age of New World
The reason the new continent will spring a sort of space race is to gather data from the land, not only a coastal line but weather a major biomes, moutains ranges, rivers. Everything necessary for future settlers. Also a new tech race on navigation will sprung. Visionaries will dream of under-water-boats, starting the project of the (probably first) submarine. Long-range-any-weather-transocenic ships will gain the status today we grant to a mission to Mars. It will bring a new age.
What if there already people here? They are probably in another phase in tech development, even using a different "tech tree" but fact we reached them first. Also yes its unlikey but possible small grups can end strained here but OP can wave a complex geologial/ice age to explain it. Maybe thermals isles of heat making a sort of ring of fire connecting boths continents in immemorial times. What in that case the answer instead can be Ice Age 99