So first off, all of this functionality will not be able to be done with a single implant.
With payment, this is complicated, as it depends on where you are in the world, all of them expire, and what works and doesn’t is constantly changing.
For your transit card and gym pass, it depends on what tag type they use for if this can even be cloned. The NXP Taginfo app will probably be able to tell you.
For unlocking your phone, it is also complicated. If you use an iPhone, the answer is no (afaik). If you use an Android, the answer is maybe, but you would have to root your phone (idk of there are even options to do this anymore). If you could do this, it definitely wouldn’t be “plug and play” like you are hoping for.
Lastly, for sharing links, that should be easy with a NDEF capable implant such as the next, xsiid, next2 (soon hopefully), xnt, and others.