fairly common scenario
I'm sorry if I sound snappy, @Zazaz, but there honestly will not be a reliable answer other than 'it depends'.
In order to be of any use to you, any hypothetical answer would need to reference the relevant situation, which is what I have tried to do for you, to clarify what would most likely happen in different scenarios.
The priorities for use of the available assets are the DC (assuming they are under adult age 18 and/ or in full time education) followed by the housing needs of the two adults involved.
The starting position for a 'long' marriage, which is has lasted over ten years, would be the 50:50 division of assets, care of DC split exactly 50:50 so now maintenance is due and a clean break financial order which does not require any ongoing payments.
For a shorter marriage, especially one without DC, the starting point may be to 'each keep what you brought'
The approach when there are DC will be somewhere within those extremes, exactly to ensure that any DC can be adequately housed and cared for.
Pensions are assets just like any other, such as existing property.
If there are not sufficient assets to house DC, then pension division may be used to allow the DW to receive more than 50% of the equity in the property in return for less than 50% pension.
It is highly desirable for the divorcing parties to come to an agreement that a judge considered fair and equitable, to avoid burning more assets in order to find an agreement. If that is not possible, the judge can impose a settlement they think is fair.
Like lots of things that haven't happened yet, the answer to your question about the level of assets you might received very much depends on the situation.
Pension sharing cannot definitively be ruled either out or in, to a divorce settlement, especially in isolation from the other relevant assets. Assets will be divided according to need (needs, not wants) and availability of assets to meet that need.
The only thing we can definitely rely upon, is that if the parties are not married, then only the needs of the DC are given any consideration.
Once any DC are over 18 / not in full time education, unless costs have been divided 50:50, the standard for you to receive anything at all would be set considerably higher.
It would be a mistake to expect your non-financial contribution to be taken into consideration in the building up of those assets. This is the part that makes non married spouses who give up work for parenting so very, very vulnerable.
Hope it all goes well for you.