Birth registration in Ireland began 1864.
Keane/Kane is an Irish name.
Have you found Michael & Elizabeth's marriage in a church marriage register?
What did Michael and Elizabeth put as places of birth on censuses?
When did Elizabeth die?
What were their children's names + approximate birth years ? Were they born in Ireland or Scotland?
Added.
Elphin parish, Diocese of Elphin, County Roscommon, variant names Elphin and Creeve, Creeve
https://registers.nli.ie/parishes/0556Marriage register:
23rd January 1826 Michael Tracy & Elizabeth Tracy. Witnesses Patrick Tracy, Eleanor ? (Her last name might end in y.)
Baptism registers for Elphin parish:
June 1807-Dec. 1808
May 1810-April 1818
Aug. 1818-Sep 1825
If Elizabeth was born in Elphin parish c.1809 it looks as though the record didn't survive.
There are also some deaths in the register which is unusual for Catholic registers of the time.
Next register has baptisms 1825-1843 + a few years of deaths 1835-8. A note says there are 2 series of dates so you may have to search carefully to find relevant entries. If Michael and Elizabeth remained in Elphin parish their children's baptisms may be in the register and they may have been godparents for children of relatives, friends or neighbours.
Clicking on names of surrounding parishes on map brings up their registers. If Michael's birth year was correct and if he was born in Elphin or nearby, he was likely to have been born too early to find a record of his baptism.