It's there, it just doesn't show up very often. I've had it once since Bone Chill, and even during Bone Chill I only saw it a couple of times

I only got to play on that map twice since it's release

Its definitely there. I am on PS5 and have played on it a few times

There are 59 maps in the game. Meaning you effectively have a less than 2% chance to roll this specific map without offerings or outside modifiers.

If you want to see it more often, bring the Ormond offering to up that to effectively 25% (you can still occasionally not get the realm you brought the offering for if the game feels like it).

I have only played on it twice since it was added, you have to remember there are 3 variant's of the Ormond Lodge it has to compete with when the realm is chosen.

Actually you have around a 2.6% chance to get Ormond Lake (assuming you didn't play on Ormond during the previous match). How map selection works in dbd goes as follows:

A random realm is selected, each with an equal likelihood of being chosen. There are 20 realms, so each has a 5% chance of being selected (assuming it's the player's first ever match, my previous statistic assumes that another realm had been played on during the previous match)

A random map from the selected realm is then chosen, Ormond has 2 maps, and so the chance of specifically getting Lake Mine is half of the likelihood that you'll get Ormond.

Edit: Completely forgot that BHVR decided to add 2 variants to the original map, the actual likelihood would be around 1.3%