there are 2 apps in the store , but I can not load either one for vivoactive 5 ?
Are you talking about the Horseback activity profile? On the Vivoactive 5 it does not have this activity to choose from. You can check the list of watches that are:
https://support.garmin.com/en-US/?faq…
https://support.garmin.com/en-US/?faq=g9VOolzNBr08b7mfclmxt7#:~:text=3%20%7C%20Venu%C2%AE%203S-,Horseback,-This%20activity%20profile