Change background color of selected item in ListView in Nativescript-vue

I'm looking to change the background color of a selected item in a ListView in Nativescript-vue. Presently when I click an item it "flashes" gray as if its been selected but immediately reverts back to a white background.

My end-goal is to have a list that the user can scroll thru, select an item, and then click an "edit" button. The visual cue for what item has been selected is critical.

Rendering:

<template>
    <page class="page" >

        <ActionBar class="action-bar">
            <Label class="action-bar-title" text="Manage Accounts"></Label>
        </ActionBar>

        <StackLayout>
            <Button text="Add" />

            <ListView for="account in accountsList" @itemTap="onItemTap" class="h2" style="height:150px">
                <v-template>
                    <FlexboxLayout flexDirection="row">
                        <Label :text="account.name" />
                    </FlexboxLayout>
                </v-template>
            </ListView>

            <!-- <ListPicker :items="accountsList" v-model="selectedItem" /> -->
            <Button text="Edit" @tap="tapEdit" />
            <Button text="Return" @tap="returnButton" />
        </StackLayout>
    </page>
</template>

Method:

onItemTap(event) {
                    const itemIndex = event.index;
                    // this.accounts[event.index].bgColor = "#3489db";
                    console.log(itemIndex);
                }

Digging further thru the stacks, I encountered this issue / solution - How can I change color / backgroundColor of list item in nativescript-vue? , which seems exactly like what I'm looking to do. I lack sufficient points for posting a comment, but if someone knows how Louis solved the problem that would likely be ideal. Following his linked solution results in specifics for Ios in a more traditional NS app, and I am only mildly familiar with the NS-vue flavor presently.

Thank you.