Able to Equip Heirloom I don't own

Product: Apex Legends
Platform:PC
Please specify your platform model. PC
AMD or Nvidia Model Number Radeon RX 580 Series
Enter RAM memory size in GB 16
What is your gamertag/PSN ID/EA Account name? zxcvbnasddf
Please provide your squad mates' gamertag/PSN ID/EA Account name if possible.
Are you using any software with an overlay? No
Which Legend were you playing (if applicable)? Lifeline
Which Legends were your squad mates using (if applicable)? I don't remember.
Where did the issue occur? Returning to the lobby after a match
Which part of the map or menu were you in? If you don't remember the exact name, please describe the area or what you were trying to do in the menu. Returning to the lobby after a match
What were you doing when the issue occurred? E.g. respawning a squad mate at a beacon, using an ability, a squad mate left the game. Returning to the lobby after a match
Did your squad mates also experience the issue? I don't know
How many matches had you played in a row before the issue occurred? I don't remember.
When did this happen? (dd.mm.yy hh:mm) 03.11.22
How often does the bug occur? Rarely (0% - 9%)
How severe is your issue? Little to no impact to gameplay
What happens when the bug occurs? Giving access equip Heirloom
What should be happening instead? I don't know.
Steps: How can we find the bug ourselves? I don't know.

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(Sorry for my English)

I have accessed Bloodhound, Rampart, Wraith, and Caustic's Heirlooms. I looked at Gibraltar, Revenant, Lifeline, and Octane but I can't access their Heirlooms.

I played an Arena match with Lifeline. Our team was defeated then it redirected me to Apex Legend's Play page. Partaking in top-right in-game currencies caught my attention. It was trying to load. I want to look at Caustic's skin but I only saw two selections. One of the options was already chosen skin, and the Random Favourite selections. The other skin options didn't load. Then I saw a button bottom-right but I didn't read it. I looked at Bloodhound, Wraith, and Rampart's skins but it was the same and I selected the bottom-right button. When I was on Wraith's banner page I read the button's text. I just remember was written: Equip something, something and I want to say I don't remember any unusual thing in my last match. I just want to know if I will get the Heirlooms for good. I get into a Battle Royale match. I landed somewhere and Bloodhound's Heirloom was on his hand. I killed an enemy with a gun after I quit the match. I need to take some screenshots for proof. I tried to restart the game but the Heirlooms were still there. But there are no more loading problems and the Heirloom equipping button was gone. Actually, I'm able to unequip the Heirloom but there isn't that button.

Probably if I chose the option like other ones for other characters who had Heirlooms I could access their Heirlooms.