Hello JeelSpeed, happy to see enthusiasm for the GeoGuessr speedrunning leaderboard. We have a dedicated discord server that you can join and express suggestions and opinions.

1:
-Add more maps/ils such as the most famous maps/ils or country-type maps/ils (Ex. "Dumb Test", "United States," etc)

We have been discussing adding country spesific speedrun categories, but any category will be purely based on community interest. I am very sure that very limited players have interest in speedrunning maps like "Dumb Test, Famous Places or GeoGuessr official country maps"

2:
-Maybe a milestone goal, (Ex. "5k Points," "10k Points," "25k Points (or All points)," etc

Depending on the implementation of any of these, the WR would be the loadtime of the browser itself. People who have played GeoGuessr alot can get very close almost immediately.
But we do have interest in the community of a 100k category, where you have to play 4 consecutive 25K games in a row. Which would eliminate the grind for a amazing seed.

3:
-Category Extensions, (Ex. "Twitch/YT Chat Help (Countrystreak)," "Blindfolded (someone else who isnt blindfolded will tell/describe the location)," etc
-For full game categories, do countrystreak or something I dont really know.

The GeoGuessr Speedrunning community is great friends with the greater GeoGuessr competetive community, which has leaderboards over at plonkit.net. Alot of the things you described wants for are found on their leaderboards / highscore attempts.

Welcome to the community!

I'd personally love to play some country specific categories (probably the UK cause well obvious)

I'd run Canada

would love to speedrun country streaks you can put like 20/50 streaks categories

Can you guys pls add other categories, there is only 4 that are really hard to do.

Bump, please add more categories please. Especially county specific categories. You could put those for ILS. I would add:
United States
Canada
United Kingdom
China
India
Russia
France
Nigeria
South Africa
Brazil
Mexico
Australia