It depends on your client. They're all different. FreeFrom may not show hashtags but many othe clients do.
Check out https://nostrapps.com to see what's all available.
Just a bit curious.
How does hashtags work on Decentralised social network?
Is it the same as the other generic centralized social platforms.?
I'm not seeing a hashtag prompt while using one or more of them.
#hashtags #freefrom nostr:nprofile1qqsgv975dd0wlfsaqav4j9wqj6seh8rtk4vsnen7534y936lv8x6uhg5054nh