The World Federation site has no listing for 2020 trials at Rose Hills. According to "World Rose News" of June 2020 the Rose Hills trials in 2020 were cancelled due to Covid-19. The "Bloomables" site seems to be from Star Roses and shows practically only Meilland roses. We need some corroboration for this event, possibly a local publication.
This rose is a beast. It is the most vigorous plant in my garden. I had multiple deer attacks over last year, and this rose barely noticed. It has come out with a vengeance this spring and has been loaded with blooms. It reminds me of Belinda's Dream regarding the ease of growing it. I don't notice a ton of fragrance, but that isn't a knock against it. I have also gotten both singles and sprays this spring. The only negative is it's hard to get a perfectly unblemished bloom as moisture does tend to cause a little browning of the edges, but nothing severe. It also makes a good cut flower and lasts and above-average time in a vase. An A+ rose for sure.
My Pinkerbelle is a great garden rose (planted April 2021, own root, zone 5b Chicagoland) which grows vigorously and blooms profusely. It's free of disease but I do spray every 10-14 days. BUT (and didn't you just know a "but" was coming?) the bloom is extremely delicate and does not deal with the elements very well - namely rain and/or overnight dew. The blooms will spot from moisture which can essentially destroy a very attractive bloom.
If you live in a fairly dry climate and want a great HT grower/bloomer with an attractive white bloom with pink edging this would be one rose you should check out