I use this site to check for part numbers.
A disclaimer, this is only for reference. You may need to check with the shop for actual part number - should not differ much.
Hope it helps.

CVTF 4 liter (0.8*5) and brake fluid 1L (if short, your mechanic should have some DOT3/4 in the shop can top-up, brake fluid not a big issue mixing except DOT5 which Civic system NOT using DOT5)

my own research - staying with stock Honda/Japan HCF-2.

Reason:
1. Anything good based on online comment by other experience is expensive(some cost way more), eg: AMSOIL, RAVENOL, Castrol
2. Actually there many multi-grade CVTF rated HCF-2 compatible but not sure are those actual genuine fluid or any long term risk consider Honda CVT is quite sensitive(fragile) since there are many Honda CVT broken after 120k km onward

3. I DIY simple maintenance, I observed stock CVTF is cooked after 1.5 years and 30k km (dark and smell, jerk a bit on hot day, stop and go traffic)
4. So my personal strategy is get the CVT filters set changed (recently done at 90k and no long jerking slightly) and change CVTF using stock Honda HCF-2 annually (20-25k)

FYI, there are some owners install CVT cooler and I might give the Japan HCF-2 on next change and see any different on long run.

Your usually route is really bad condition? What makes you change it so frequently?

mine 6 years+ recently changed tyre, shop say still okay.

also checked by SC on 4th year before warranty end, no need to change.

I bought 2nd.hand FC year 2018, using Fully Syn 0W30.