A county map showing parishes is on Lancashire Online Parish Clerks website.
www.lan-opc.org.uk/indexp.htmlYou can then look at the home page for each parish to see list of churches and which register transcripts are there.
I use the Ancestor Search pages on LANOPC (under "Search" in menu) when attempting to find people in nearby parishes. Select parish, in this case Standish as the starting point.
Enter ancestor's name or just surname if it's not a common one, year +/- up to 20 years; enter a distance in the distance box e.g. 5 miles. List of results will show distance from your chosen central church in Standish. I tried it for my Roby ancestors whose earliest records in Standish were 1770's and found a few possibilities for baptisms of my 5xGGM in adjacent parishes.
Another source for locating churches is GENUKI. Can see a list of churches in a place or do a search for churches within a chosen radius, filtered by denomination if required, and see them marked on a map. Markers on maps are colour-coded by denomination; red = C. of E. Click on a marker for name and foundation year of a church.
https://www.genuki.org.uk/big/eng/LAN/StandishSelect "Nearby Churches". Churches within 3 miles radius will appear on the map.
Information on GENUKI, like LANOPC is provided by volunteers.