We can see the posts on both platforms (except for the case of de-federation).
Competition is an odd topic for open source software. For example, whilst mastodon, kbin and lemmy are all competing for attention, they are collectively making the activitypub ecosystem more attractive.
A similar thing happens with linux: Oracle, red hat, canonical etc all compete for market share, but pay for developers to work on the wider linux ecosystem (the kernel as well as GNOME and other apps etc)
I use it untill I need to type a name. Then I type normally and forget about swipe typing exists…
… I then start using it again the next week